Technically the answer would be a
The correct answer is B. Finally, I stood still, listening to the barely audible whoosh- whoosh- whoosh from the propellers.
Explanation
Sounds can be represented linguistically through words, this resource is known as onomatopoeia. Onomatopoeia is the use of letters to form words in the language itself to imitate certain non-verbal sounds, such as the sounds of animals, natural phenomena, impacts, devices, etc. Therefore, the correct answer is B. "Finally I stood still, listening to the barely audible whoosh- whoosh- whoosh from the propellers" because in this sentence the onomatopoeia "whoosh" is used to express the sound of the birds.
We need a story or the rest of the information to figure out the answer
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.