The correct answer is: C. see, goes
The sentence is about the speaker’s desire to see Margaret before she goes out. The speaker is not sure when Margaret is going out, so they use the simple present tense to express their intention to see her before she leaves. The simple present tense is used to talk about things that happen regularly or repeatedly, or to talk about things that are happening now or will happen in the near future.
The verb “see” is in the infinitive form because it is the object of the verb “want.” The verb “goes” is in the simple present tense because it is the main verb of the sentence.
The other options are incorrect because they do not agree with the tense of the sentence. Option A, “saw, went,” uses the past tense, which is not appropriate for a sentence about the speaker’s current desire to see Margaret. Option B, “will see, will go,” uses the future tense, which is not appropriate for a sentence about something that the speaker wants to do in the near future. Option D, “is seeing, is going,” uses the present progressive tense, which is not appropriate for a sentence about something that the speaker wants to do before Margaret leaves.