Sentence 5 The bottom line is that seat belts are proven to save lives; therefore, everyone should be forced to wear one if they want to travel by car or truck.
The answer is B. Aunt Marth has both a kind and cruel personality.
The allusion to Robert Louis Stevenson’s novel Dr. Jekyll and Mr. Hyde in this passage means that Aunt Martha has a personality similar to the "bipolarity" of Dr. Jekyll.
“ Sometimes people say silly things. They do not intend to be mean.”