A: Because he found his honey!
Explanation: Sweetie, dear, my love, honey. These are all words/ phrases that a person might use for his or her significant other, for the love of your life. So, when you “find your honey” you find that person who means a lot to you. Then, you could marry that person.
This joke plays on the double meaning of the word honey: a sweet treat made by honey bees and someone who you love. In this case the bee found his honey, his love. The honey he made, is back at the bee hive.