The correct answer:

Line A

Line A is longer, of course. Did you think it was too easy to be true? We wanted to test your conformity. The power of conformity can be amazing: in a similar experiment (The Power of Conformity Experiment), approximately 75% of subjects agreed with the wrong statement about line length.

Did you answer Line A straight away? SHARE this test with your friends and loved ones and see how strong is their power of conformity!