I believe the first three. 1 and 2 are safety precautions. 3 can help someone remember what the file is. For number 4, the computer will typically do that on its own but not as the exact file name. Usually by right clicking and looking under info it will show the size of the file.
A because her grade is being raised. it is a positive impact.
Adam D'Angelo is the CEO and co-founder of Quora, an online knowledge market. He was also chief technology officer and <span>vice president of engineering for Facebook.</span>
A hypothesis or educated guess
