Use the correct adjective

David is my(blank) brother
A. Elder
B. Bigger
C. Older
D. Smaller

C. Older

The correct adjective to use in the sentence is "older." Therefore, the correct option is C. Older.

To determine the correct adjective to fill in the blank in the sentence "David is my (blank) brother," we need to consider the meaning and context of the sentence.

In this case, we are looking for an adjective that describes David's position in relation to the speaker.

We have the following options:

A. Elder: This adjective refers to someone who is older in age or higher in rank.
B. Bigger: This adjective relates to size and is not suitable for describing a person's age or rank.
C. Older: This adjective is commonly used to refer to someone who is of greater age or seniority.
D. Smaller: This adjective refers to size and is not applicable in this context.

Given that the sentence is talking about David's position in relation to the speaker, the correct option would be C. Older, as it appropriately indicates that David is the speaker's older brother. So, the correct answer is C.