Answer:
A) Connor meets higher productivity targets than McKenzie.
Explanation:
Title VII of the Civil Rights Act protects employees against workplace discrimination based on national origin (option E) and gender (option C).
There is also a law (Age Discrimination in Employment Act) that protects older employees from discrimination due to their age, but option D would not be the case because that law doesn't protect young employees. Usually older employees are discriminated, not younger ones, so option D doesn't apply either.
A weaker economic background per se usually does not represent a limitation on your salary since companies tend to pay according to performance, not social status (option B is out).
As stated before, companies tend to pay their employees based on their performance, and if Connor meets higher productivity productivity targets, then it is reasonable that he earns a higher salary. He just works better.