It was with great delight that I read in your February _____ the letter to the Editor written by Prof. Johnson.

A．issue

B．printing

C．magazine

D．copy

某商品按期望获利50%进行定价。销售若干件后为了尽快收回全部资金，进行打折处理。若打八折，则全部售完后可获利26%。那么未打折处理的商品与打折处理的商品的件数之比为（）

A.1：4

B.2：5

C.2：3

D.3：1