23.Excess sodium in the diet may lead to high blood pressure or hypertension, ____.
(A)it is a disease affecting one in four Americans
(B)is a disease affecting one out of four Americans
(C)a disease affecting one in four Americans
(D)one in four Americans are affected by this disease

D是錯的，正確答案是C！上面的最佳解沒有講清楚，請看榜首的詳解↓
Excess sodium in the diet may lead to high blood pressure or hypertension, ____. 
(C)a disease affecting one in four Americans 
完整的句子還原如下↓
Excess sodium (鈉) in the diet may lead to high blood pressure or hypertension (高血壓), a disease (一種疾病，這裡作為高血壓的同位語)  that affects one in four Americans .  注意，hypertension 就是high blood pressure。後面想要進一步詮釋這種病，就帶出「同位語」a disease (一種疾病) 來說明。同位語之後再用了關代子句。關代that可以省略，把動詞affects改成affecting，就是正確選項的句子。經部聯招的文法考試會比一般大學指考還難，選文法書一定要選對。

excess / 過分；過量；過度

sodium / 鈉

hypertension / 高血壓

A, B 選項哪裡不對呢?