Final answer:
Both statements about mouth guards are false. Stock mouth guards are mass-produced, not made by dental professionals, and custom-made mouth guards require a dental professional to tailor them to an individual's teeth, hence not available in stores.
Step-by-step explanation:
The subject of the question is Health, specifically regarding mouth guards and dental health. The first statement, "Dental professionals fabricate stock mouth guards," is incorrect because stock mouth guards are typically mass-produced and not made by dental professionals. The second statement, "Custom made mouth guards can be purchased at most athletic and drug stores" is also false, as custom made mouth guards are specifically tailored to an individual's teeth by dental professionals and are not available for purchase off-the-shelf at stores. Therefore, the correct answer is (d) both statements are false.
To clarify regarding mouth guards, there are generally three types: stock mouth guards, which are pre-formed and intended to be used directly from the package; boil and bite mouth guards, which can be purchased at retail stores and molded at home; and custom-fitted mouth guards, which are made by dental professionals to fit the unique contours of an individual's teeth.