Hey there! Hello!
I believe the comma should go here:
<span>"I saw three kids sitting on the porch, across the street."
"Across the street" is a sentence fragment. These are typically separated from the rest of the sentence with a comma. Sentence fragments may seem like sentences, but you couldn't make it it's own sentence, since it doesn't contain a verb. A sentence must have a verb and a subject in order to be considered valid, and in the case of fragments, they're purely there to add more to the current sentence.
I hope this helped you out! Feel free to ask me any additional questions if you have any. :-)</span>
Who is your teacher? Because if you call and ask for the study guide it is really helpful, unless you already entered the exam the you must stay in or it locks you out.
The answer is D because a progressive verb is one that ends in -ing.