OG13 SC-2的疑惑

半夏死磕GT

2. Manufacturers rate batteries in watt-hours; if they rate the watt-hour higher, the longer the battery can be expected to last.
(A) if they rate the watt-hour higher, the longer
(B) rating the watt-hour higher, it is that much longer
(C) the higher the watt-hour rating, the longer
(D) the higher the watt-hour rating, it is that much longer that
(E) when the watt-hour rating is higher, the longer it is

虽然知道c是正确答案，但是og中说a中的they指代manufacturer。其实they前面有两个复数名词，可以理解为是指代不清吗？还是说只能指代主语？
b中rating...是悬垂修饰语。修饰对象不清。悬垂修饰的对象是前一句的主语，所以说不清楚的吗？

bejamin1111

主句主谓宾，从句主谓宾，manufacturers在主句做主语，they在从句做主语，指代ok