Yes.
Is the simple answer.
Answers to Closed Questions restrict the scope of the response to a Yes/No or Black/white Answer.
For example
"Do you think Route "A" is the fastest way to town?"
or
"Do you think the fastest way to town is Route "A" or Route?"
"Yes" or "A"
Would be complete answers to these questions.
You may get supplementary information in reply but it is not a condition of the question you are asking.