Professor X Is Studying the Effect of Exposure to Sexual

Professor X is studying the effect of exposure to sexual content on sexual thoughts.She assigns students to one of two conditions.In the first condition,participants are exposed to explicit sexual content and then given a word-completion task,which involves filling in the letter missing from each word.Based on the letter added,the word could be of a sexual nature or not.For instance,b_d could be completed as "bed," indicating sexual thought,or as "bad," which has no sexual connotation.In the second condition,participants are not exposed to explicit sexual content but are assigned the same word-completion task.The dependent variable is

A) sexual thought.
B) the word-completion task.
C) exposure to explicit sexual content.
D) random assignment.