Answer:
im think im not sure but it think it A.
Explanation:
We only know about extinct groups like dinosaurs, ammonites and trilobites through fossils. Some animals and plant are only known to us as fossils. By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other.
The answer to the blank is none of the above as the answer to the blank is Upward Social Mobility.
Social mobility refers to the individuals or groups movement in social position and upward social mobility is the ability to move up in social class and the opposite is the downward mobility. The movement or the social mobility is based on education, occupation, wealth and other social variable.
Answer:
The best option is D. decreasing costs while increasing positive consequences
