[求助]大家帮我看看大全TEST D-8好不？

逻辑大全的test D 的第八题：

8.     When the government of a nation announced recently that a leader of the nation’s political opposition had died of a mysterious illness in prison, few seasoned observers of the regime were surprised. As the police captain in an old movie remarked when asked about the condition of a prisoner, “We’re trying to decide whether he committed suicide or died trying to escape.”

The statements above invite which of the following conclusions?

(A) The opposition leader was probably killed trying to escape from prison.

(B) The opposition leader may not be dead at all.

(C) It is unlikely that the head of the regime knows the true cause of the opposition leader’s death.

(D) The opposition leader probably killed himself.（E）

(E) The regime very likely was responsible for the death of the opposition leader.

我也知道E对，可是D为什么错呢？无论是自杀还是died trying to escape不都是自己杀自己么？？大家帮我看看吧，谢谢：）