Answer:
I believe the answer is the 4th option.
Explanation:
When you are continuing a sentence after a piece of dialogue you add a comma. Also, there aren't any places where you would pause in the second piece of dialogue which would mean there aren't any commas.
The answers would be: Cognitive learning
I agree with the other person, the other sentences are not complete. so in turn it must be: Wagon trains might include 100 wagons.
maybe
