Which two sentences from the passage most clearly support or make clear the author's main claim, as identified in the previous question?

Responses
A I disagree with the argument that tutoring can take place during “non-essential” classes.I disagree with the argument that tutoring can take place during “non-essential” classes.
B I agree with the proponents of a longer school day that standardized tests are here to stay.I agree with the proponents of a longer school day that standardized tests are here to stay.
C One way to avoid the problems raised by voluntary tutorials is to make these sessions mandatory.One way to avoid the problems raised by voluntary tutorials is to make these sessions mandatory.
D Therefore, I propose the following strategy: This school district should establish partnerships in the private sector.Therefore, I propose the following strategy: This school district should establish partnerships in the private sector.
E With motivation to attend tutorials, higher percentages of students will pass the test. Furthermore, participating businesses will have a return on their investments in the local community

The sentence "One way to avoid the problems raised by voluntary tutorials is to make these sessions mandatory" from option C and the sentence "With motivation to attend tutorials, higher percentages of students will pass the test. Furthermore, participating businesses will have a return on their investments in the local community" from option E most clearly support or make clear the author's main claim.