The argument presents a “most” statement (most of Molly’s classmates are gardeners), connects it to another most statement (most gardeners are people with a great deal of patience), and then draws a “some” statement as a conclusion (at least one of Molly’s classmates must be a person with a great deal of patience). This commits the same flaw as the stimulus of erroneously purporting that a “most” statement linked to another “most” statement allows you to infer a “some” statement.

No flaw. We know most of Molly’s classmates are gardeners and most gardeners are people with a great deal of patience. Knowing this information, it’s entirely possible that some of Molly’s classmates could be people with a great deal of patience.

Wrong flaw. (C) presents a “most” statement (most of Molly’s classmates are gardeners), connects it to another most statement (most gardeners are people with a great deal of patience), then concludes that one of Molly’s classmates who is a gardener must be a person with a great deal of patience. However, we have no idea if any of Molly’s gardener classmates have a great deal of patience. Though Molly has gardener classmates and most gardeners have a great deal of patience, we don’t know if that applies to any of Molly’s gardener classmates. The stimulus, meanwhile, draws no conclusion about a Compujack employee who is, specifically, a computer programmer. It only draws a conclusion about a Compujack employee more generally.

Wrong flaw. While most gardeners have a great deal of patience, and most of Molly’s gardening classmates are women, you can’t infer that at least one of Molly’s female classmates has a great deal of patience. It’s possible that none of her female classmates have a great deal of patience. The stimulus, on the other hand, errs because it links two “most” statements and, as a result, erroneously infers a “some” statement.

No flaw. If most of Molly’s classmates are gardeners with a great deal of patience and most of her classmates are women, at least one of Molly’s female classmates must be a gardener with a great deal of patience. There has to be at least some overlap between the two groups.