A. for personal use
B. for military purposes
C. for transportation purposes
D. for communication purposes

Depends on what you consider the first computer. Some people consider Charles Babbage's machine invented in 1822 as the first computer. But I suspect you are referring to Eniac. Look it up.

Google is your friend. Time to do your work and do the research needed to find the answer. This isn't a difficult question to find the answer to.