Question #N292

The first time a person is introduced to a new idea or concept, it often has a strong impact. This effect can be especially striking when the new information challenges the way that we think about the world. For example, when I first learned about the dangers of climate change, ______.

Which choice completes the text so that it conforms to the conventions of Standard English?
A. I was shocked and dismayed by the evidence.
B. it was a shock to me.
C. the information made a lasting impact.
D. it was a very important discovery.