Label each of the following as an empirical, a priori, or subjective probability.
A. The probability that US stock returns exceed long-term corporate bond returns over a 10-year period based on Ibbotson Associates data.
B. An updated (posterior) probability of an event arrived at using Bayes' formula and the perceived prior probability of the event.
C. The probability of a particular outcome when exactly 12 equally likely possible outcomes exist.
D. A historical probability of default for double-B rated bonds, adjusted to reflect your perceptions of changes in the quality of double-B rated issuance.