The integers numbers are the numbers that can be written without a fractional component. It is a subset of the rational numbers.
A. 3/4: Is not an integer, as it needs a fractional component.
B. - 1.326482546731654...: This is an irrational number, as it not possible to express it even as a fraction.
C. 725: Is an integer.
D. 0: Is an integer.