Read the sentence. Even historians argue over what these ancient tablets contain in its inscriptions.
Which answer shows the correct way to write this sentence?
Even historians argue over what these ancient tablets contain in it's inscriptions.
Even historians argue over what these ancient tablets contain in their inscriptions.
Correct as is.
Even historians argue over what these ancient tablets contain in they're inscriptions.

correct as is

Explanation:

it's mean it is, that doesn't work

their implyies ownership, that doesnt work

they're means they are, that doesn't work

(i checked my answers with grammarly.)

the time most likely will repeat, in the story.

sentence lenght varies according to word choice.you select which word to use and that will require to use other expressions that collocate with the word chosen.sentence length will vary   according to the choice of words you make to express your ideas.