To which sets of real numbers does zero belong?

A whole numbers, integers, and irrational numbers

B natural numbers, integers, and irrational numbers

C whole numbers, integers, and rational numbers

D natural numbers, integers, and rational numbers

C whole numbers, integers, and rational numbers

Which of the following numbers is an Integer, but NOT a Whole number?

10

25

3.5

-4

3.5

Which of the following is an irrational number?

14

100−−−√

π

-15

π