Teo makes a necklace of x green beads at $0.75 each and 3 blue beads at $0.30 each. The average cost of the beads in the necklace is $0.60. Choose an equation to model the situation. A. 0.75x – 0.90 = 0.60(x – 3) B. 0.75x + 0.90 = 0.60(x – 3) C. 0.75x + 0.90 = 0.60(x + 3) D. 0.75x – 0.90 = 0.60(x + 3)