PLZ HELP ME PLZ ANSWER CORRECTLY

What is the area of the square floor tile?\

A. 50 ft ^2 IS WRONG

Select one:

B - 100 ft^2

C - 100 square root 2 ft^2

D - 150 ft^2

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap