Mismatched premises. This fails to satisfy a sufficient condition. Squeeze toys that aren’t designed for cats are safe for infants, but (A) never establishes that this item is a squeeze toy—only that it’s sold prewrapped. The stimulus properly triggers its sufficient condition.

Mismatched premises. This only uses one sufficient condition (all politicians in town have websites) for its conclusion. The stimulus uses a conditional chain.

Mismatched conclusion. This establishes a sufficient chain, but draws the wrong inference. We could infer that Will’s passport is a visa, but there’s no way to prove that it belonged to a particular subgroup (those issued through diplomatic channels). The stimulus properly triggers a conditional chain.

Mismatched premises. This mistakes a necessary condition for a sufficient one. Any winter garment—except for designer ones—is on sale, but being on sale is not sufficient for establishing that the shirt is a winter garment. The stimulus, in contrast, establishes a sufficient chain and makes no such mistake in triggering it.

This proceeds by triggering a chain of sufficient conditions. Bloom House is a townhouse that was not built last year, which means it’s a residential building. Since all residential buildings are subject to the fire code, (E) properly infers that the Bloom House is subject to the fire code.