从最后的四个单词中选择一个来替换hold back,要求不改变原意.请帮我看看选哪个,

从最后的四个单词中选择一个来替换hold back,要求不改变原意.请帮我看看选哪个,
If marketers hold back products while waiting for the prices to go up,these products are not part of supply._____
withdraw retreat preserve reserve
我个人是可以排除掉retreat 和 preserve的，更倾向于选择reserve，但是答案给的是withdraw,我这个书确实有出现过错误，所以请大家帮我看看。