Passage Summary: Alice will only help out if two specific things happen. Since one of those things definitely isn't happening, Alice isn't going to help.

Conclusion: Alice will definitely not volunteer for the fund-raising drive.

Reasoning: Alice's participation is contingent upon two conditions: her brother volunteering and a majority promise; since the second condition is not met, her participation is ruled out.

Analysis: The reasoning here follows a strict conditional structure: A requires both B and C. Since C is false, A must also be false. This is a classic application of Modus Tollens involving a compound necessary condition. To find the parallel, look for an answer choice that establishes a requirement consisting of multiple parts and then concludes the result won't happen because one of those parts is missing.