Question

{..., –3, –2, –1, 0, 1, 2, 3, ...} A. rational numbers B. irrational numbers C. whole numbers D. integers

Answer 1

Do you recall the definitions of each of those terms?
rational number
irrational number
whole number
integer

Answer 2

For example, look up your term "rational number" if you are not familiar. It is the set of all fractions, essentially. p/q where p and q are nonzero integers.