The correct answer is A. reliable.
The writer was 'an authoritative source' because of her degrees, guest appearances, etc. Thus, she was a source you could rely on, she was reliable, given that she had experience to back her ideas up. Therefore A is the only correct answer.
Answer:
1.Refuse to wear masks (If this is too debatable I can change it)
2. Say crude things
3. Vandolies
The answer is b- the harsh ethics to the lifeboat become even harsher when we consider the reproductive differences between rich nations