Which of the Following Describes Triplett's Dynamogenic Theory Explaining the Superior

Which of the following describes Triplett's dynamogenic theory explaining the superior performance of cyclists in the presence of others?

A) Solitary cyclists did poorly because they worried about whether they were going fast enough, which exhausted their brain and muscles, numbing them and inhibiting motor performance
B) Friends of the cyclists usually rode as pacers and no doubt encouraged the cyclists to keep up their spirits
C) In a race, a follower might be hypnotised by the wheels of the cyclist in front and so rode automatically, leaving more energy for a later, controlled burst
D) the presence of another person racing aroused a 'competitive instinct'-the sight of movement in another suggested more speed, inspired greater effort, and released a level of nervous energy that an isolated rider could not achieve alone