Writers should include references to their research in an argument because it adds credibility to the argument to the argument they wish to prove.
The sentence which is the most subjective is D. My mother had to be the best cook in the world.
It is subjective because that is your own opinion - the other examples are just facts.
Most wild birds feed themselves with fruit from trees, and killing insects that they hunt.
Answer:
A
Explanation:
Cassius suggests that they would do well to kill Antony in addition to Caesar, but Brutus refuses, saying that this would make their plan too bloody.