What methods and tools allow us to gain both historical and current perspectives of New Mexico?

The correct answer to this open question is the following.

The methods and tools that allow us to gain both historical and current perspectives of New Mexico are the following.

There are many methods by which we can conduct our research about the state of New Mexico. We can use primary sources such as a direct interview with the elderly in important locations such as Pueblo, New Mexico. A place with rich oral tradition from locals. They could have witnessed key events in the formation of the state. If we go to a museum,  there are documents that were written by witnessed important phases of New Mexico in the time they occurred.

We can also go to a library to look for texts written by authors experts in this subject. This is a secondary source of information. We can also look for encyclopedias. Another resource we have is going to the office of Tourism of the state of New Mexico because they could have historic documents to improve our research.

b). (sounds as the best answer)

a.   it resulted in widespread unemployment.