The argument links online courses with distraction at home and then directly concludes they are ineffective. For this move to work, the speaker must be assuming that distraction has a strong negative impact on learning outcomes. If distraction did not significantly reduce learning effectiveness, the fact that students “often get distracted” would not support the claim of ineffectiveness. Thus, the hidden bridge premise is that distraction harms learning in a substantial way.
Option A:
Option A overstates the issue by claiming distraction is the only factor, which is not required for the argument; the reasoning can proceed even if other factors exist.
Option B:
Option B is an additional claim about traditional classrooms that is not necessary for the argument; the focus is on online context and distraction.
Option C:
Option C correctly identifies the needed link between distraction and reduced effectiveness, which is what turns the observation into a criticism of online courses.
Option D:
Option D introduces cost, which is irrelevant to the line of reasoning about effectiveness and distraction.
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