如图所示用气枪射击池水中的鱼，在射击时应瞄准（　　）

A．看到的鱼

B．看到的鱼的上部

C．看到的鱼的下部

D．看到的鱼的右边

A certain Social Security recipient will receive an annual benefit of $12,000 provided he has annual earnings of $9,360 or less, but the benefit will be reduced by $1 for every $3 of annual earnings over $9,360. What amount of total annual earnings would result in a 50 percent reduction in the recipient’s annual Social Security benefit ？（）(Assume Social Security benefits are not counted as part of annual earnings.)

A．$15,360

B．$17,360

C．$18,000

D．$21,360

E．$27,360