For the first one:
B.) Historical documents, eyewitness accounts, etc. that provide direct or firsthand evidence about an event, object, person, or work of art.
For the second one:
B.) Her mother stared at her (because "stared" sounds more threatening than "looked").
Hope this helps!
In the way that it says it
The answer is D. Sentence 7. When it says "plates may also collide", it is bringing up another topic about the plates. As you read past sentence 7, you notice a shift in topic as you are reading. Instead of plates sliding against each other, the speaker is now talking about them colliding.
