ANSWER

EXPLANATION
The area of the original rectangle is 72 in².
If the length and the width of the rectangle are changed by a scale factor of 3.5.
Then the area will change by

To get the area of the new rectangle is we multiply the area of the original rectangle by 12.25.
This implies that,the area of the new rectangle is

Therefore the area of the new rectangle is 882 square inches.
I graphed it out and it seems that both A and C are correct. I would check them to make sure.