From the words or group of words lettered A to D, choose the one that best completes each of the following sentences. I am sorry to bother you.......I have ...

Answer Details

The correct option that best completes the sentence is "but". The sentence expresses an apology for bothering someone, but also indicates that the speaker has something important to tell them. The word "but" is used to connect these two contrasting ideas. It is a conjunction that shows a contrast between two parts of a sentence. In this case, it is used to contrast the speaker's apology for bothering the listener with their need to convey important information. Therefore, the correct answer is option B, "but". The other options do not fit grammatically or convey the same meaning in the given context.