This is a sentence. it has a subject and verb.
Answer:
relapse
Explanation:
The prefix re- means again, the "re" in registration is not a prefix.
Here are the answers to the given sentences above:-No one answered the ad but me. It is used as PREPOSITION.-There is but one choice to make in this case. It is used as an ADVERB.-Sadie said she would go but she had to bring her sister. It is used as a CONJUNCTION
C is incorrect because the period shouldn’t be placed until you have mentioned who has said the dialogue