Is the example a complete sentence, sentence fragment, or run-on sentence?

opened the gifts at the end of the party.

a.
complete sentence

b.
sentence fragment

c.
run-on sentence

what are the phrases to choose from?

1. it me on problems i dont know.

2. i can others, which gives me extra practice

3. i learn new things.

4. it fun and easy to use which relives stress.

5.i can prepare myself for tests and quizzes

hope this buddy!

plz mark brainliest

- courtney

constantly changes their schedule.

always on phone a lot more than normal.