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Read the following passage written by a teen hero:

YOU HAVE TO LOOK AT THE SENTENCE WITH THE ARROW POINTING TO IT!

1. I want to be a vocal advocate for nature.

2. I reject the idea that I am too young to make a difference.

3. I recently helped a group with a river cleanup.

⇒4. I was mortified to see the destruction of animals and plants.

5. When I got home, I composed a letter to my state politicians and asked them to . allocate more money to the local river cleanup effort.

6. I believe my vocation is to help citizens see that we are at a junction.

7. We can decide to subject nature to abuse, or we can decide to be a benefactor to nature.

8. I won't let obstacles detract from my mission.

In sentence 4, the root in the word "mortified" means

A. frustration

B. death

C. disappointment

D. sadness