In Each Set Below, Select the Letter of the Sentence

Multiple Choice

In each set below, select the letter of the sentence in which all of the apostrophes are used correctly. In which sentence are apostrophes used correctly?

A) Your'e careless about crossing your t's and dotting your is.
B) You're careless about crossing your t's and dotting your i's.
C) You're careless about crossing your ts and dotting your is.