It suggests:
B. He is a victim.
The correct answer is: Nobody knows everything he or she can about the brain.
Explanation:
There are different types of pronouns. They help to replace the noun in a sentence. In this case, the word "<em>Nobody</em>" is part of the indefinite pronouns and they are always used in the singular. So, it is necessary to change the personal pronoun "<em>They</em>" for the singular "<em>He or She</em>".
1. To prepare
2. To eat
3. To live
4. To give
5. To make
6. To be
7. To go
8.To see
9.To go