请教各位大虾!

M:You know the summer internship I'm applying for?They want an official copy of all my grades .But the records office charges $20 for an official grade report.That's a lot,don't you think?

W:It really is.I only had to pay 6 for mine last year.

Q:What does the women mean?

A:She doesn't agree with the man

B:The man doesn't need an official grade report

C:Official copies of grades used to be cheaper

D:The man should go to a difference office

答案很明显是C，根据说话人二可以得出，但是我对“It really is”这句话不太理解，请问各位大虾应该怎么理解“it really”这句话？？？