According to the passage, the causes of fast food’s popularity involve the following EXCEPT ______.

参考解析：

细节理解题。根据文章第二段第一句“When it comes to restaurant dining, fast food is nearly as cheap as it gets, so price is one of the primary reasons people frequent them”、第三段第一句“Fast food is simple to obtain and practically on every corner, providing a quick way to purchase a meal”、第四段第一句“Many fast food restaurants offer guilty pleasures on their menus, such as French fries and bacon”以及第五段第一句“Fast food restaurants spend a large amount of money on marketing their meals to consumers, and it seems to be effective”可知，快餐流行的原因包括价格实惠、方便、口味好以及市场营销好。故选D。