A city pool sells full-day and half-day passes during the summer. The goal is to make $1000 each day from pool pass sales. The g
raph shows possible combinations of full-day and half-day passes they need to sell to make $1000. What is the maximum number of full-day passes the pool can sell and make exactly $1000? A) 50 B) 100 C) 150 D) 200