题目选项分析

At HappyDay farms, seasonal staff is employed to pick apples during the harvest season each year. This staff is trained to identify and select only high quality apples, table-worthy apples. As part of this process, apples that have been visibly damaged by insects or disease are left to rot in the fields. The farmer who owns the property and sells the fruit is, therefore, less well informed about potential problems with his crops, such as insect infestations, than are the pickers themselves.

The conclusion drawn above is based on the assumption that

【选项】the farmer obtains all of his information about problems with fruit quality from no source other than the pickers.