Sprague & Beard, Inc. has six separate departments. One is a tutoring department, that provides quality study support to demanding students. If the tutoring department is closed, the general manager will not be affected because his/her services would still be needed by the remaining departments. If all operations cease, however, this manager would be laid-off. Which of the following is the primary lesson to be learned from this scenario?

a. The relevance of costs is context sensitive.

b. Some sunk costs can be avoided (and would therefore be relevant).

c. Opportunity costs are never relevant.

d. Quantitative information must be precise and accurate in order to be relevant.

e. Qualitative information need not be precise because it is never relevant.