A scenario in which a meeting action can be challenged is when the notice is defective. Proper notice is crucial for the legitimacy of any meeting, as it ensures that all members are adequately informed about the time, place, and agenda of the meeting. If the notice does not meet the required legal or procedural standards, it can be contested. A defective notice may prevent members from participating in discussions or decisions, thus impacting their rights and the overall governance of the association.
Conversely, situations such as a meeting attended by a majority or the presence of a quorum, while essential for valid deliberations and decisions, do not inherently undermine the legality of the meeting itself. Similarly, an equal vote does not invalidate the outcome but may lead to a tie that requires further action to resolve. Therefore, the correctness of the answer highlights the fundamental importance of proper notice in the functioning and governance of community associations.