Answer:
Miep's conscience would not let her deny helping the Frank family.
Step-by-step explanation:
Miep did not consider herself a particularly outstanding person, but she knew that if she did not help the Frank family that her conscience would not leave her in peace and she would regret the decision for the rest of her life.
The other options are not correct because they do not capture the overwhelming point of the excerpt which is to emphasize that Miep helped the Franks because he conscience told her that it was the right thing to do.