Identify the correct sentence.
a.It was such a surprise to open the door and see Sylvia​ (whom we​ hadn't expected).
b.It was such a surprise​ (to open the​ door) and see Sylvia whom we​ hadn't expected.
c.It was such a surprise to open the door and see​ (Sylvia whom we​ hadn't expected).
d.It was such a surprise to open the door​ (and see Sylvia whom we​ hadn't expected).