The stuffed toy bore a glossy look.

The correct answer is C. sleek.

A glossy look is a smooth, shiny appearance. It is often associated with luxury and sophistication. A dull look is the opposite of glossy, and is characterized by a lack of shine or luster. An obscene look is offensive or disgusting. A ventilating look is not a common expression, but it could be interpreted to mean that the toy is well-ventilated and does not retain heat.

In the context of the question, the stuffed toy is described as having a glossy look. This suggests that the toy is made of a smooth, shiny material. The other options do not fit the description of the toy as well as sleek.