Which is a correctly written sentence, not a run-on?

A.
The gate to our backyard had been left open our dogs got out while we were gone.

B.
Our cousins are coming for a visit we plan on taking them to the zoo and the museums.

C.
Our backyard was all soggy from the rain, the dog's paws were all muddy.

D.
Our car wouldn't start, so Dad called a tow truck to take it to the mechanic.

Question

Which is a correctly written sentence, not a run-on?	
 
 A.
The gate to our backyard had been left open our dogs got out while we were gone.
 
 B.
Our cousins are coming for a visit we plan on taking them to the zoo and the museums.
 
 C.
Our backyard was all soggy from the rain, the dog's paws were all muddy.
 
 D.
Our car wouldn't start, so Dad called a tow truck to take it to the mechanic.

anonymous · Answer

@GabbyCakes plz help :(

anonymous · Answer

The correct answer is D @TheyCallMeJuan

anonymous · Answer

THANK YOU! i have a test and you just possibly saved my grade! @GabbyCakes

anonymous · Answer

Yay! I'm so glad i could help c: