A comma and a conjunction always work well but it really depends on the sentences you are combining.
Answer: Both Oliver and Noah come from a poor social background, but while Oliver's parentage is unknown, Noah's is known. Even though Noah is almost as poor as Oliver, he considers himself superior to Oliver.
They have changed the world by creating interesting things that amaze us and let’s us do the right things
Answer:
It is C. discovering all available means of persuasion on a topic
Explanation:
I took the test on egde and also it is because he thinks that rhetoric is the way you can use to persuade people in by any means.
im not sure what you mean please give more info