What sentence represents the number of test questions in the problem below? a test is worth 80 points. multiple-choice questions are worth 2 points, and short-answer questions are worth 4 points. if the test has 25 questions, how many multiple-choice questions are there? o a. the number of multiple-choice questions plus the number of short-answer questions is 80. o b. the number of multiple-choice questions times the number of short-answer questions is 25. o c. the number of multiple-choice questions minus the number of short-answer questions is 80. o d. the number of multiple-choice questions plus the number of short-answer questions is 25.