Question

Question was provided via image upload.

Explanation:

We analyze the subject of the clause "After I woke up...". The subject of the verb "woke up" should be a subjective pronoun. "I" is a subjective pronoun and is correct here. Option b is the same as the underlined word, option c "we" would change the meaning (the sentence is about "I" waking up, not "we"), option d "their" is a possessive pronoun and doesn't fit as a subject. So the underlined "I" is correct and no change is needed.

Answer:

a. NO CHANGE