This app is supposed to be for school but I have nothing else to do so hi

Which statement is not true about run-on sentences? a. a run-on sentence has more than one clause. b. one way to correct a run-on sentence is to add a joining word c. one way to correct a run-on sentence is to add an appropriate punctuation mark. d. a run-on sentence has only one clause.

We shall not always plant while others reap

Which best completes the list of brainstorm ideas?