[題目] 2題文法題請教

題目：
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
答(C)，後面子句是說明高血壓
請問(A)多了it is 不對的原因是?

題目：
The restaurant_____next to the bank sells excellent pasta
so it attracts a number of guests.
(A)that locates (B)located (C)locating (D)is located
答(B)，因為本身程度很差，看起來好像每個答案都可以，
請問這題是考什麼?
謝謝幫忙回答!

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