B.B is the correct answer because of the grammar.
A) "The diseases we immunize against are not gone and they are still deadly."
This quote best shows the harm that can come from a child not being vaccinated for deadly diseases. In this quote it shows that a child who contracts a disease that he or she could be vaccinated for may end up dead. Option B would support the idea of not vaccinating and the question needs evidence to support vaccinations. Option C is neutral either way. It is simply stating a fact without encouraging for or against vaccinations. Option D addresses parents concerns that vaccinations lead to autism. This does not imply that parents harm their children by NOT vaccinating them.
In the story, "The Cold Equations" by Tom Godwin, Barton the pilot wanted to save Marilyn, the 18 year old girl who was considered an EDS stowaway. He most likely will not succeed because the mission he was carrying out would fail and ultimately kill a lot of people. The girl wanted to meet her brother and talk to him. The story shows events with restriction wherein a hero defies the restriction and tries to save the girl in the process, despite the negative feedback from the government pertaining a law to throw the girl off the ship. In the end, the girl accepted her fate, and after talking with her brother, she was ejected off the ship.