Which group of words is a run-on sentence?

Although Harriet is a careful and diligent writer she still made mistakes, she didn't read it thoroughly.

Jay went sightseeing on his own and caught up with the group later.

The rain was cold, and the wind was piercing.

Luis just gave up on it this time.

7th grade language Atrs.. Please help! :D ty so much

Question

Which group of words is a run-on sentence?

 Although Harriet is a careful and diligent writer she still made mistakes, she didn't read it thoroughly.

 Jay went sightseeing on his own and caught up with the group later.

 The rain was cold, and the wind was piercing.

 Luis just gave up on it this time.

7th grade language Atrs.. Please help! :D ty so much

anonymous · Answer

Please help me... i got a huge test!:D Thanks for all who help i really appreciate it!:):):)

anonymous · Answer

Please help me...... :( I ot alot of stuff i have to answer on my big big big big huge test! Thanks:D