Which of the Following Is True of Subjective Probability

Which of the following is true of subjective probability?

A) It is a measure of the historical frequency of an uncertain event.
B) It is a measure of the frequency of a certain event.
C) It represents the decision maker's best assessment,based on current information,of the likelihood of an uncertain event.
D) It represents an arbitrary or ad hoc assessment.
E) It measures the degree of variation around the mean.