题目选项分析

Investing in fishing-boats could be very profitable at this time. A survey made by "Hook, Line and Sinker" magazine shows that 75 percent of the magazine's readers want to buy a new fishing-boat during the summer. However, fishing-boat manufacturers can only produce enough boats to satisfy 30% of total potential buyers.

Which of the following, if true, would undermine the soundness of the investment advice in the paragraph above?

【选项】Only half of those who say they want to buy a fishing-boat actually end up buying one.