Answer:
Usha is correct
Step-by-step explanation:
See attachment
Given
Dimension of the development


Dimension of a football field


First, we calculate the area of the development.
Because it is triangular in shape, the area is:


Convert mile to meter




The area of 50 football pitch is then calculated as:



By comparison:

<em>Hence, Usha's thought is correct</em>
The answer is (x^4y^6+1)(^8y^12x^4y^6+1)
Answer: C. is the correct answer.