Ruby is making friendship bracelets. She has a total of 156 beads to make bracelets for 12 friends. If she uses all the beads, what is the unit rate of beads per bracelet?
A. 15 beads
B. 12 beads
C. 13 beads
D. 10 beads
A. 15 beads
B. 12 beads
C. 13 beads
D. 10 beads