If I were you, I would try to come at the topic from a different angle. The vast majority of communists do not view communism as a "better choice" than capitalism. Much like capitalism was not a better choice over feudalism, it was simply the most logical social system to be born out of the one that preceded it. Do some research in the two most dominant areas of communist thought (Marxist and anarchist) and then try to lay out a thesis that fulfills your paper requirements.
"The people have proved that they can run it... They (the pigs) can call it what they want to, they can talk about it. They can call it communism, and think that that's gonna scare somebody, but it ain't gonna scare nobody" ― Fred Hampton
“Mao Zedong said that power grows from the barrel of a gun. He never said that power was a gun. This is why I don't need no gun to do my thing. What I need is some freedom and the power to determine my destiny” ― Huey P. Newton