"Has been waiting" should be your answer. a simple predicate is the verb or verb phrase in the sentence and it usually tells what the subject does.
Option A answers the text best.
Answer:
Calpurnia is being motherly, taking the kids to church after washing them the night before, making sure they were dressed and ready to go to church that day, protecting them from a criticizing negro woman.
Explanation:
The correct answer is all of the above.
During that time, confessing to witchcraft is a hard thing to do because you might get punished by the law.