Answer:
C
Step-by-step explanation:
So we are looking for the GCF which is the largest factor that the two numbers have in common, so you would want to circle all of the number that the two have in common. So it would be 2 twos and 2 X's (2,2,x,x). Which is the most numbers that the two have in common.
Negative 45 or -45 because different signs with multiplication are always negative
It cannot be simplified more than that. hope this helps!