Answer:
C
Step-by-step explanation:
If 5x is a positive odd number, using 1 for x would satisfy this.
So the number of even numbers between 5(1) and 5(1)+6 would be the numbers between 5 and 11.
You have 6, 8, 10 between those numbers that are even
If you chose 3 for x instead:
5(3) and 5(3)+6 ; 15 and 21
These also have 3 even numbers between them, being 16, 18, and 20
