See you . . . . . . . . Wednesday morning. A. at B. on C. by D. of

The correct answer is: on.

The preposition “on” is used to indicate a specific day of the week, month, or year. In this case, the speaker is saying that they will see the listener on Wednesday morning.

The other options are incorrect because they do not indicate a specific day. The preposition “at” is used to indicate a specific time, while the preposition “by” is used to indicate a deadline or a point in time by which something must be done. The preposition “of” is used to indicate a part or a portion of something.

Here are some examples of how the preposition “on” is used:

• I will see you on Wednesday morning.
• The meeting is on Friday at 2pm.
• My birthday is on the 1st of January.
• The concert is on the 25th of December.