Katherine should just act like Elena and when Klaus come he won't know which is which.

..but katherine doesnt have a heartbeat ... elena does... wouldnt he know then??

Katherine might have fooled Damon but I doubt it with Klaus. They should just turn Elena already. In the sách she turns, does, comes back, turns into something else then human again... there are all kinds of possibilities. Turning her into a vampire would solve their problems and not what they could do with the hiển thị after that at all.

She doesn't have a heartbeat like SalvatoreBroFTW said. Also, don't bạn remember the episode, Rose? Elijah smelled Elena and was able to tell she was human. I'm sure Klaus could do the same thing P:.

Klaus is realy old so would be able to tell regardless of the tim, trái tim beat but the tim, trái tim beat is a def give away plus kat only cares about her self so Klaus would only have to threten her and she would tell them herself nice idea though

Klaus knows Katherine and also He knows the difference between Elena and Katherine because of the witches.

I mean, Klaus is the oldest original vampire and I'm guessing he would know how to tell humans and ma cà rồng apart, and he could get a witch to tell him the difference, bcuz bonnie was always able to tell just bởi touch :)