Answer:
Which sentence uses the apostrophe correctly?
3. I think it's Begin Spelling, i t ' s, End Spelling time to quit
Step-by-step explanation:
1. c a n t ' - x can't - √
2. Ive' - x I've - √
4. Did'nt - x Didn't - √
Therefore, option 3(it's) uses the correct apostrophe correctly.