The correct answer is (C).
A person who is bad-tempered is often irritable and easily angered. This can make it difficult for them to maintain relationships with others, as people may not want to be around someone who is constantly angry. As a result, people who are bad-tempered often have few friends.
The other options are incorrect because they do not accurately reflect the relationship between bad temper and the number of friends a person has. Option (A), “a lot of,” is incorrect because it suggests that people who are bad-tempered can have many friends. However, as discussed above, this is not the case. Option (B), “a lot of,” is also incorrect because it is the same as option (A). Option (D), “a few,” is incorrect because it suggests that people who are bad-tempered can have some friends. However, as discussed above, this is also not the case.