Kendra Is Reading Module 2 in Her Psychology Textbook,and She

Kendra is reading Module 2 in her psychology textbook,and she comes to the major module heading of "Critical Thinking-Take It with a Grain of Salt." She should

A) keep reading.
B) turn the heading into a question.
C) look up the term "critical thinking" in the dictionary or Wikipedia.
D) reflect on what salt has to do with critical thinking.