What can be inferred about the professor's opinion？
A. He is strongly in favor of the impact hypothesis.
B. He does not believe that mass extinctions happened.
C. He thinks that mass extinctions were important to evolution.
D. He views mass extinction as a preventable occurrence.
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According to Paragraph 4, how did the Academy of St. Luke differ from the Platonic Academy？
A. One of them focused on painting while the other focused on architecture.
B. The Platonic Academy was supported by the guilds, but the Academy of St. Luke was not.
C. They were constructed at the same location but in different years.
D. The curriculum consisted only of artistic subjects at the Academy of St. Luke.
Why does the professor say this:
A. To express uncertainty
B. To disagree with the evidence
C. To acknowledge the disappearance
D. To ask for some ideas
What does the professor mean when she says this:
A. She is warning the student that she could take more serious action.
B. She is indicating that she is not sure what she wants to do.
C. She is asking the man to come up with a solution for the situation.
D. She is forgiving the man for causing a problem in her class.
What is the evidence for the impact hypothesis？
A. The clay from the Cretaceous Period contains an element that is rare on Earth.
Both hemispheres suffered the same amount of damage and extinction.
C. Acidic precipitation is still not evenly distributed across the Earth.
D. Rocks that may have been part of an asteroid have been identified.
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