I think it might be “2u(to the second power) - 6u + cu - 3c”. All I did was distribute and see if there were any like terms to combine and resulted in that, hopefully that helps!!
C. It has been said that there are other ways to solve the problem.
This is because it shows that the author has investigated other possible solutions and not just the one that they are writing about. All of the other answers just support the claim without mentioning anything else.
The answer is (A) because a poem has to rhyme right ??