Final answer:
Only someone with a truly macabre sense of humor would use a hearse as a family car or a coffin as a bed. 'Macabre' refers to a preoccupation with the grim aspects of life, which fits the context of the sentence.
Step-by-step explanation:
The correct answer to the question is a) macabre. A macabre sense of humor involves finding the humor in what is generally considered dark, gory, or related to death. Using a hearse as a family car or a coffin as a bed certainly aligns with a fascination with the morbid or grim aspects of life, which is characteristic of a macabre sense of humor. In contrast, a whimsical sense of humor is lightheartedly odd or fanciful; somber relates to a gloomy or depressing mood; and jovial describes a hearty conviviality or spirit of good-fellowship. Only someone with a truly macabre sense of humor would decide to use a hearse as the family car or a coffin as a bed. The word 'macabre' refers to something that is disturbing, gruesome, or related to death.