In Some Situations, Logically Relevant Evidence Can Be Excluded

In some situations, logically relevant evidence can be excluded. In a rape prosecution,

A) the defendant's prior criminal convictions cannot be admitted due to unfair prejudice in all cases.
B) the prosecution may not bring a defendant's bad reputation into court. [Assume that the defendant has not testified.]
C) the alleged victim's past sexual history with other people can be excluded from evidence.
D) the prosecutor could have old girlfriends/boyfriends of the defendant testify concerning bad deeds that the defendant has committed in the past.