Option D: “meat” makes the sentence meaningful. In it the speaker is asking whether there is some meat kept in the fridge. Thus, it is the correct option.
Option A: “moat” refers to a ditch or trench dug around a building (usually a fort) as a form of protection. This is meaningless in the given case. Hence, this option is incorrect.
Option B: “might” is the past tense of “may” and represents a possibility, for example, “She said she might be there.” This is meaningless in the given case. Hence, this option is incorrect.
Option C: “meet” refers to a planned or unplanned encounter with someone. This is meaningless in the given case. Hence, this option is incorrect.