What has enabled Texas manufacturers to help the state's economy become more productive?

A. environmentally friendly techniques
B. new computer technology***
C. new labor practices
D. population increases

How has the oil industry in Houston changed over time?

A. It is less diversified than it was 20 years ago.
B. It is now based on oil drilling rather than manufacturing.
C. It no longer converts crude oil into petrochemicals.
D. It now employs more white-collar workers.***

Which physical characteristic of Texas had the greatest impact upon its settlement? Select all that apply (3).

A. the land's suitability for farming or ranching***
B. the proximity to missions and military establishments***
C. the presence of oil and natural gas***
D. the proximity to sources of water

1 answer

I know that 1 is correct, but I don't know about the other ones.