HEY I NEED HELP HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Let p: The integer has one digit. 
Let q: The integer is less than 10.

Which represents "The integer has one digit if and only if the integer is less than 10”?

A. p ∨ q
B. p ∧ q
C. p → q
D. p ↔ q