Answer:
C
Explanation:
Let's go through each of the answer choices:
I) All real numbers are rational numbers.
This is immediately proven false by irrational numbers: real numbers that are not rational. Examples include π or √2.
II) Zero is an integer number.
This is true. Integers include the set of whole numbers, which includes 0.
III) All counting numbers are whole numbers.
This is true. Whole numbers (0,1,2,3...) is basically the counting numbers (1,2,3,...) but with 0.
IV) Irrational Numbers are not real numbers.
This is false. Real numbers can be divided into two subsets: irrational and rational.
So, our answer is C :)