What Does It Mean If a Question Is Considered "Open-Ended

Multiple Choice

What does it mean if a question is considered "open-ended?"

A) Anyone in the class can respond to the question.
B) The students are given an extended response time to the question.
C) The response includes an answer or answers along with all possible explanations.
D) A response will be accepted only after additional explanation.
E) There is not always necessarily one, correct response.