In which one of the following sentences is the apostrophe used correctly?

a. the train began it's journey across country.
b. the cat licked it's paws while the dog watched.
c. it's up to you to decide what to do.
d. i put the letter back into it's file.

Drag the tiles to the correct boxes to complete the pairs. match these vocabulary words taken from great astronomers with their definitions. to come between two things, to interrupt the capacity to reason, judge, and act intelligently to form an opinion without strong evidence relating to the sky conjecture arrowright interpose arrowright celestial arrowright sagacity arrowright