What are the important variables in the problem below?
A test is worth 50 points. Multiple-choice questions are worth 1 point, and
short-answer questions are worth 3 points. If the test has 20 questions, how
many multiple-choice questions are there?
OA. t for test, q for questions
B. s for short answer, t for test
OC. p for points, m for multiple choice
D. m for multiple choice, s for short answer