When writing cause and effect essay, it is important not to have fallaciousreasoning. Please select from the following choices the one with mistakenreasoning. 
A、Eating a lot chocolate-gaining weight: eating a lot chocolate can make people gain weight according to experiments 
B、Wearing a red sweater-doing well in exams: wearing red sweaters can make people do well in exams according to personal experience 
C、long-term sun exposure-tanned skin: long-term sun exposure can make people’s skin tanned according to large-scale surveys