题目选项分析

In a recent poll, 71% of respondents reported that they cast votes in the most recent national election. Voting records show, however, that only 60% of eligible voters actually voted in that election.

Which of the following pieces of evidence, if true, would provide the best explanation for the apparent discrepancy?

【选项】Prior research has shown that that people who actually do vote are also more likely to respond to polls than those who do not vote