What does the idiom “To have a bone to pick with someone” mean?

A. To enjoy a hearty bone-based meal with someone
B. To have a dispute or unresolved issue to address with someone
C. To support archaeological excavations
D. To engage in a competitive bone-collecting hobby

Explanation:

The correct answer is B. To have a dispute or unresolved issue to address with someone. The idiom “to have a bone to pick with someone” means that there is a disagreement or unresolved matter that needs to be discussed or addressed with that person.