Which sentence does not contain any errors?

A. Theyre still trying hard to earn youre trust.

B. There still trying hard to earn you're trust.

C. They're still trying hard to earn your trust.

D. Their still trying hard to earn youre' trust.

From the options provided, the sentence which does not contain any errors is:

C. They're still trying hard to earn your trust.

"They're" is a contraction of "they are" which therefore needs an apostrophe and "your" is a possessive pronoun placed before a noun it modifies therefore must be written without an "s".

Maybe C? Not sure ...