(A) The first is a conclusion for which support is provided, but it is not the main conclusion of the argument; the second is an unsupported premise that supports the main conclusion of the argument. Incorrect. BF1 is the main conclusion and it is supported by BF2. BF2 is correct.
(B) The first is a premise that supports the argument’s only explicit conclusion; so is the second. Incorrect. BF1 is not a premise. It's the argument's only conclusion.
(C) The first is the only explicit conclusion of the argument; the second is a premise that supports that conclusion. Correct. BF1 is the MC and BF2 supports it.
(D) The first is the main conclusion of the argument; the second lends support to that conclusion and is itself a conclusion for which support is provided. Incorrect. No support has been provided to BF2 and BF2 is not a conclusion. It's premise supporting BF1. BF1 is correct.
(E) The first is a premise that supports the only conclusion of the argument; the second is that conclusion. Incorrect. As mentioned in B, BF1 is not a premise. It's the argument's only conclusion.
Option C
Bunuel
Health official:
Increasing the frequency of anti-smoking warnings may be ineffective. Aside from annoying the majority who do not smoke,
it may weaken all anti-smoking messaging by leading people to believe that such warnings are needlessly stringent. Moreover, there is nothing to suggest that those who typically disregard anti-smoking messages will pay heed when the messages occur more frequently.
The two sections in boldface play which of the following roles in the public health official’s argument?
(A) The first is a conclusion for which support is provided, but it is not the main conclusion of the argument; the second is an unsupported premise that supports the main conclusion of the argument.
(B) The first is a premise that supports the argument’s only explicit conclusion; so is the second.
(C) The first is the only explicit conclusion of the argument; the second is a premise that supports that conclusion.
(D) The first is the main conclusion of the argument; the second lends support to that conclusion and is itself a conclusion for which support is provided.
(E) The first is a premise that supports the only conclusion of the argument; the second is that conclusion.