honestly, "as the devil would have it" has a negative effect on the person/thing because as we all can agree, NOONE should mess with the devil :)))
Your answer is going to be D) or C)
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
Logos since it is trying to convince an audience with the use of logic.