The correct answer is A. will come.
The sentence is in the present tense, and it expresses a future event. The verb “will come” is the most likely future tense form of the verb “come” to be used in this context.
The other options are not as likely to be used in this context. The verb “is coming” is the present continuous tense form of the verb “come.” It is used to describe an action that is happening at the moment of speaking. In this context, it would imply that Sue is already on her way to the party, which is not what the speaker is trying to say.
The verb “have come” is the present perfect tense form of the verb “come.” It is used to describe an action that has happened in the past and has a result that is still true in the present. In this context, it would imply that Sue has already been to the party, which is not what the speaker is trying to say.
The verb “came” is the simple past tense form of the verb “come.” It is used to describe an action that happened at a specific time in the past. In this context, it would imply that Sue came to the party at some point in the past, but she is not there now. This is not what the speaker is trying to say.
Therefore, the correct answer is A. will come.