Princdeton Review Test1-ID1558

At first sight, Elsinor Castle, with its glass windows and sophisticated casements, was disappointingly modern, but as one walks through the portal one begins to feel the presence of history.

B. At first sight, Elsinor Castle, which has glass windows and sophisticated casements, was

C. At first sight, Elsinor Castle, with its glass windows and sophisticated casements, is

正确答案是C， 我想问如果B里面把was改成is的话，B选项是否正确呢？