I think the most reasonable one is C
You can divide the numerator and the denominator by 2 to get 1/5.
The value of 7 in 67098 is 7000 and the value of 7 in 74702 is 70000 or 700 so it is either 10 times or 1/10th of the the value.
Answer:

Step-by-step explanation:
Remember 
You are given the fraction 
First, multiply the numerator and the denominator by -2-3i:

This gives you 13 in denominator, now multiply two complex numbers in numerator:

Thus, the initial fraction is

Im not exactly sure but i think:
r^2+6r+2
________
5r^2-5r-25
remember IM NOT SO SURE