24 points with these questions! will mark brainiest!

why did the chinese require the portuguese to pay for goods in gold and silver when trading?

portuguese goods were less valuable than chinese goods.
the chinese already had a surplus of portuguese goods.
the imperial government wanted to stockpile gold and silver.
portuguese and chinese currencies were not exchangeable.

(08.01 mc)

map one is a map of the density change from the tang to the song dynasties. the map is titled four population growth, 750-1250. there is a map key that indicates green represents a decrease, light yellow represents a constant or slight increase, gold represents one hundred percent to three hundred percent, orange represents more than three hundred percent and red indicates more than one thousand percent. central and north china contain mostly green, light yellow and gold. central and southern china contain mostly light yellow and gold. south-central an southwest china contain mostly light yellow, gold and orange. south and southeast china contain mostly orange and red.

map two is a map showing two tang china from 618 ad to 907 ad. there is a map key that indicates a black line or a green line represents a road, dark orange shading represents an area of high population density and a white squared indicates an metropolitan prefecture. the city of duji in the north, is represented by many black and green lines, orange shading and a white square. changi an, in the north is represented by many black and green lines, orange shading and a white square. wuzhou in the northeast, is on the coast and is represented by many black and green lines and orange shading.

based on both maps, which of these describes china's population density between the tang and song dynasties?

it changed very little between the two dynasties.
it shifted from the north and northeast to the south and southeast.
it increased from the north and northeast to the south and southwest.
it partly changed in the south but remained the same in the east.

map of europe and north africa labeled "spread of christianity." dark green indicates christian areas, 325 ce. the dark green areas are small, isolated patches surrounding the mediterranean sea. light green indicates christian areas added by 476 ce. most of spain, gaul, italy, greece, and asia minor are light green. the light green extends to the european inland, and as far north as parts of great britain. it also extends to part of egypt and syria, and the north african mediterranean coast. a grey line indicates the boundaries of the roman empire, 476 ce. this line extends around the mediterranean, from north africa in the south, beyond jerusalem to the east, and into northern gaul.

based on the map, which of these statements is true of christianity?

it was limited to the empire's boundaries before 325 ce.
it expanded into asia minor between 325 and 476 ce.
it spread to britain, spain, and gaul after 476 ce.
its spread was limited by the mediterranean sea.

why was paul a significant figure in christianity?

he spread jesus' teachings to gentiles.
he translated jesus's words into many languages.
he freed christians who had been arrested.
he wrote much of the old testament.