Food Coma

Read this thank you note and try to guess the meaning of the idiom in bold:
What do you think the idiom food coma means?

A. The state of foods, especially vegetables, that are nearly dead before being completely cooked or ingested.

B. Feeling very tired and sleepy shortly after eating a big meal.

C. A punctuation mark in the shape of food indicating a pause between parts of a sentence.


The answer is.... 

B.  Feeling very tired and sleepy shortly after eating a big meal.

  Eat responsively!