Question

my dog could not stop running in circles, he was excited. (a) no change (b) running in circles—he was excited. (c) running in circles, because he was excited. (d) running in circles—because he was excited.

Explanation:

The original sentence is a run - on sentence. Option C corrects it by using "because" to show the cause - effect relationship clearly. A dash in this context is not the best choice as it is less clear in showing the causal link compared to "because".

Answer:

C. running in circles, because he was excited.