China’s 3d express coach runs primarily on power.
a.
solar
b.
nuclear
c.
gasoline
d.
hydroelectric

solar

Explanation:

China 3D Express Coach also is known as a three-dimensional fast bus is powered by solar energy and electricity. It is 4 to 4.5 meters high and passengers board on the upper level while vehicles lower than 2 meters can go through underway. The bus can carry 1200-1400 passengers and speed up to 60 km/h. It is environmentally friendly and reduces traffic jams congestion on the city roads.    

the first question's answer is a.

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.