Results of a Small Experiment Show That People Are Likely $p$

Results of a small experiment show that people are likely to offer a different amount for used exercise equipment when bargaining with a friend than when bargaining with a stranger. The $p$ -value from testing the difference in mean offers was equal to $0.00162$ . At an $\alpha = 0.05$ , the correct conclusion is to

A) reject the null hypothesis.
B) fail to reject the null hypothesis.
C) conclude that there is no difference between bargaining with a stranger versus a friend.
D) Both A and C.
E) Both $\mathrm { B }$ and $\mathrm { C }$ .