Need with english.

the thesis statement of your research report
a. can be a question or an answer, either one
b. is always a question
c. is never a question. rather, it is the answer to a research question

make no change because everything else is correct

the study supports the argument that school music programs improve student learning.

"an ulterior, usually implicit meaning or quality" is the definition of a. overtone.  

hope this ! good luck hun!