Which is correct about the relationship between the U.S. population and steel consumption in the early 1900s?

Question

[A] Steel consumption increased slightly, while the population increased drastically during the early 1900s.
[B] Both the population and steel consumption increased drastically during the early 1900s.
[C]The population increased slightly, while steel consumption increased drastically in the early 1900s.
[D] Both the population and steel consumption increased slightly during the early 1900s.

Answer 1

It would be Both the population and the steel consumption increased drastically during the early 1900s.