Answer:
Wheat
Explanation:
The grasslands were plowed up so that wheat could be planted. While nothing actually grew without the rain during the dust bowl, the crops were plentiful after the drought.
Answer:
c. oil was discovered.
Explanation:
The discovery of oil at Spindletop was seen as a defining moment in the oil age.
I think the answer may be Personal Education Background. I assume the question is talking about credit as in credit card. Payment history is a big part of credit, personal health history may be important because if you have a lot of debt that you are struggling to pay off it could affect your credit I think and length of employment I would say is important because you need a job to pay. I'm not 100% in this though, I'm just trying to help.
Hope this helps! (:
The answer to the question is C