令人困惑的一題邏輯

The mind and the immune system have been shown to be intimately linked, and scientists are consistently finding that doing good deeds benefits one’s immune system. The bone marrow and spleen, which produce the white blood cells needed to fight infection, are both connected by neural pathways to the brain. Recent research as shown that they activity of these white blood cells is stimulated by beneficial chemicals produced by the brain as a result of magnanimous behavior.

The statements above, if true, support the view that

(A) good deeds must be based on unselfish motives lack of magnanimity is the cause of most serious illnesses.

(B) magnanimous behavior can be regulated by the presence of absence of certain chemicals in the brain.

(C) magnanimous behavior can be regulated by the presence or absence of certain chemicals in the brain.

(D) magnanimity is beneficial to one’s own interhests

(E) the number of white blood cells will increase radically if behavior is consistently magnanimous

答案是D     請問是怎麼推出來的呢?! 怎麼不選E呢??

人的精神和免疫系统是紧密相连的，科学家的发现都一致证实了为善有益人的免疫系统。骨髓和脾，都产生白细胞用以对付感染/传染，两者都通过神经系统连接到大脑。最近的发现都显示出白细胞的活动受到大脑产生的一种有益的化学物质的刺激，而这种化学物质正是由”大度/宽宏大量”的行为带来的。

原文意在说 为人大度些 可以提高免疫系统 1句和2句所列的事实是作者的论据  原文不是为了证明科学怎样怎样 而是说这样做有益于one's own interests个人的健康  

The statements above, if true, support the view that

问题问的是可以从上面这段话推出什么观点

E中的radically 和 consistently 都是从原文中推断不出来的。而且白血球的增加也不是上面那段话想要推出的结论。正如2楼所说的“原文不是为了证明科学怎样怎样 而是说这样做有益于one's own interests个人的健康”