Which ending is the best choice to accomplish his assignment?

After they argue, Maritza ignores Avery, and she writes about Irene Morgan.
After they argue, Maritza agrees with Avery, and they write only about Rosa Parks.
After they argue, Maritza convinces Avery, and they write about both Rosa Parks and Irene Morgan.
After they argue, Maritza and Avery are unable to agree on whether to write about Rosa Parks or Irene Morgan.