You are confident that your new roommate is a critical thinker after noticing the following bumper sticker on his car:

A) "Show me the evidence!"
B) "The only truth is no truth."
C) "Trust your gut!"
D) "What is the meaning of life?"

Critical thinking involves analyzing and evaluating evidence before forming a conclusion. The bumper sticker "Show me the evidence!" directly reflects the importance of evidence in critical thinking, indicating a demand for proof and a rational approach to claims or beliefs.