Two expert raters are trained to rate the ability of graduate students to use different kinds of questions when gathering information. After three weeks of training, their interrater reliability is .60. These raters:

A) have achieved high interrater reliability.
B) have a way to go before they are proficient at rating.
C) need to make the definitions of "the use of questions" a little more vague so their ratings will improve.
D) None of these are true.