Answer:
The narrator says about Miss Taylor that “the mildness of her temper had hardly allowed her to impose any restraint” in order to show the following:
B.Miss Taylor was a sweet person who gave Emma few rules.
Step-by-step explanation:
Miss Taylor's temper was mild, that is, soft, meaning she was a lighthearted person who was usually in a good mood. If she hardly impose any restraint, it means that it was not a part of her nature to try to control Emma all the time, which implies she gave Emma few rules.