According to Results of a Study That Examined the Effects

According to results of a study that examined the effects of music on restaurant patrons, which of the following statements is true?

A) consumers spent more money when fast music was played
B) customers were served faster when slow music was played
C) customers had higher bar bills when slower music was played
D) estimated gross margins were higher when fast music was played
E) customers were willing to wait longer for a table when fast music was played