In response to office workers’

Answer choices

1. A

   No Impact5% picked this

   Few of the office workers surveyed participated in regular health programs during the

   This states that few workers participated in health programs, which has no direct link to the correlation between VDT use and headaches, failing to address the causal connection.

   5%
2. B

   No Impact2% picked this

   In their study the researchers failed to ask the workers to distinguish between severe migraine

   This indicates researchers didn’t distinguish between headache severities. The conclusion concerns any headaches linked to VDTs, making this distinction irrelevant to the causal claim.

   2%
3. C

   Strengthens2% picked this

   Previous studies have shown that the glare from VDT screens causes some users

   This claims glare from VDTs causes eyestrain, indirectly supporting the link between VDT use and headaches, aligning with the causal premise under discussion.

   2%
4. D

   Correct82% picked this

   Office workers who experienced frequent headaches were more likely than other workers to overestimate how much time

   Why this is right

   This suggests that those who experience frequent headaches overestimate their VDT usage, pointing to a third factor—misreporting—as a reason for the correlation. This challenges the causal link by suggesting that headaches are independent of actual VDT use.

   Skill tested: Weaken · how this choice captures the argument's function is the move to repeat next time.

   82%
5. E

   Strengthens8% picked this

   Office workers who regularly used VDTs experienced the same amount of job-related stress as workers who

   This claims VDT users experience the same job-related stress as non-users, ruling out job stress as an alternate explanation and lending support to the VDT-headache causal connection.

   8%