Marvin,who Lives in San Francisco,has Been Asked to Host a Teenage

Marvin,who lives in San Francisco,has been asked to host a teenage alien,Regor,as part of an intergalactic exchange program.Marvin is sure that Regor would love to experience the adventure of sailing,but decides he should introduce the concept of a "sailboat" first.Marvin begins by sharing the dictionary definition of a boat: "a small vessel propelled on water by oars,sails,or an engine." The primary problem with this definition is that it ____.

A) is broader than the information Regor needs to identify sailboats
B) does not provide a good way to think about the category's variability
C) excludes many category members that should be included
D) provides a checklist with too many exceptions