Which of the Following Statements About Scoring Items on a Test

Which of the following statements about scoring items on a test is most accurate?

A) Ordinarily, students should either receive all of the credit or none of the credit on a problem.
B) Standards mandate the manner in which to score test items.only.
C) There is no such thing as a test item that has only one acceptable answer.
D) Students should receive credit for demonstrating mathematical thinking on a test.
E) Partial credit is subjective on the part of the teacher and should be avoided.