There are two windows in this bedroom. _______of them face south

There are two windows in this bedroom. _______of them face south, overlooking a beautiful park.
A、Both
B、One
C、The two
D、Either
【正确答案】：A
【题目解析】：face 谓语动词为原型，因此排除BD（需要使用三单形式），没有 the two of them 这种用法。