Which statements explains the key differences between Source A: Kayla Silver and Source B: Local Newspaper? Select two correct answers. Practice A Source A: Kayla Silver cites only Saturday school as the way to increase learning time and Source B: Local newspaper gives additional options cited by the study (extending days and shortening summer) . B Source A: Kayla Silver says Saturday School is the best way to increase learning time and Source B: Local newspaper does not state an opinion about which option for increasing learning time is best. C Source A: Kayla Silver gives her opinion about increased learning time on Saturday and Source B: Local newspaper gives an opposite opinion on increased learning time on Saturdays. D Source A: Kayla Silver refutes all other options with evidence and Source B: Local newspaper refutes the Saturday school option.

c. taught scientists many new things about the earth, but not other planets.

explanation:

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.

i think it's b or c hope this