All of the following statements regarding Alternative Forced Choice methods (e.g., the 2AFC method) are true except one, which one?

A. They are used to decrease the influence of response bias on measured thresholds.

B. They are a modification that can be added to classical threshold-seeking methods such as the method of constant stimuli.

C. The number of alternatives offered on each trial determines the chance level of performance.

D. They necessarily increase the time it takes to measure a threshold by a factor equal to the number of choices.

E. None of the above. That is, all of the above are in fact true regarding xAFC methods.