The house-numbers on a certain street go from 1 to 88. The function B(n) models the type of the building whose number is n according to the following key: Building type ~ Function output:
Residential building 0
Commercial building 1
Government building 2
Other 3

Which number type is more appropriate for the domain of B?
Choose 1
A Integers
B Real numbers

What's the appropriate domain?
Choose 1
A) 0, is less than or equal to, n, is less than or equal to, 88
B) 1, is less than or equal to, n, is less than or equal to, 3
C) 0, is less than or equal to, n, is less than or equal to, 3
D) 1, is less than or equal to, n, is less than or equal to, 88

If you can help me that would be great!