Please attend . . . . . . . . this matter immediately. It is urgent. A. with B. on C. to D. at

The correct answer is: to.

The preposition “to” is used to indicate the purpose of an action. In this case, the speaker is asking the listener to attend to the matter immediately. This means that the listener should focus on the matter and take action to resolve it.

The other options are not as appropriate in this context. The preposition “with” is used to indicate association or involvement. In this case, the speaker is not asking the listener to be associated with the matter, but to take action to resolve it. The preposition “on” is used to indicate a location or position. In this case, the speaker is not asking the listener to go to a specific location to deal with the matter, but to take action to resolve it. The preposition “at” is used to indicate a time or date. In this case, the speaker