Which is a run-on sentence?

A.
When I was picking apples off the tree at dusk, a deer stood at the edge of the orchard.

B.
Camilla, who was our baby-sitter when we were little, was a contestant on that TV game show.

C.
If you want to play softball this year, sign-ups are at the field this coming Saturday.

D.
There were big, dark clouds in the sky, on our way home, buckets of rain and hail fell the whole way.

Question

Which is a run-on sentence?	
 
 A.
When I was picking apples off the tree at dusk, a deer stood at the edge of the orchard.
 
 B.
Camilla, who was our baby-sitter when we were little, was a contestant on that TV game show.
 
 C.
If you want to play softball this year, sign-ups are at the field this coming Saturday.
 
 D.
There were big, dark clouds in the sky, on our way home, buckets of rain and hail fell the whole way.

anonymous · Answer

@AloneS XD

alones · Answer

This sentence seemed like joined together without any proper conjunctions or punctuations so I 'd say D

anonymous · Answer

I thought run on sentences keep going on when there should be a period...

alones · Answer

:) ** u thought xD

anonymous · Answer

XD

ashleyisakitty · Answer

I agree with @AloneS

anonymous · Answer

@Ashleyisakitty can you help with a few more?

anonymous · Answer

Which is the subject of this sentence? 

Watch for snakes during the hike up the trail.
 
 A.
(you)
 
 B.
hike
 
 C.
trail
 
 D.
snakes