Can we book visa slot with one i20 and then change to other?

I have i20 from a few school, namely NCSU, ASU and others. And I am still waiting for i20 from TAMU. But TAMU is taking

In 2009, the price of each Econolux car increased by 10 percent from the 2008 price... (GRE Quants)

In 2009, the price of each Econolux car increased by 10 percent from the 2008 price. In 2010, they decreased by 5 percen

Do Professional LOR’s require any stamp from the company?

Do we need to get the lor sealed / stamped or is it not required and can we submit a pdf?

I'm a fresh Graduate with an Undergraduate Degree in Business Administration. I do not have substantial work ex but have internship experience in Marketing. I have admits from US universities for MS in Marketing (STEM).

Is it ok to go for a 1 year MS Degree? Would it affect my job prospects?