The conclusion above depends on the presupposition that

(A) companies can be successful even when about half of the decisions they make about marketing prove to be wrong

(B) companies hiring her consulting firm make no more incorrect marketing decisions than do companies in general

(D) marketing decision are just as likely to be correct as they are to be incorrect（E）

(E) it is possible to classify a marketing decision properly as being either right or wrong

问题：个人认为E项的意思为：市场策划可以被评估为正确的或是错误的。

而原文意思是“市场策划有一半的可能性能够成功”。E项不完全符合原文之意呐。

大家多多指正哦。