A salesman sold twice as much pears in the afternoon than in the morning. If he sold $390 kilograms of pears that day, how many kilograms did he sell in the afternoon?	Choose the correct option:
A) 120  B) 180  C) 260  D) 280  E) 320

Rationale: "3 x = 390 x = 130 therefore , the salesman sold 130 kg in the morning and 2 ⋅ 130 = 260 kg in the afternoon . so answer is c ."
Answer: C