Which of the Following Statements Is True Regarding Surrogate Questions

Which of the following statements is true regarding surrogate questions?

A) Surrogates often remain constant at different times in the evaluation process.
B) An example of a surrogate question is,"Will the product sell?"
C) They are based on the fact that the timing of factual information often matches our need for it.
D) Their response has little value except to help answer a critical question that cannot be answered directly.