Marissa is selling paintings for $12 each and bracelets for $6 each. Her goal is to sell at least $500 in products, and she must sell at least 40 bracelets. Which of the following combinations will satisfy these constraints?
A. 30 paintings and 42 bracelets
B. 20 paintings and 42 bracelets
C. 15 paintings and 50 bracelets
D. 10 paintings and 44 bracelets