Answer:
i believe A, if not then im sorry
Explanation:
When somebody puts " ing " at the end of a word (verbs) its become " happening " for example: watch- watching * present noun.
And to it's in future like I'm going to sleep it's when you are going to do it
The correct answer would be steep.
<span>The Future of Old Faithful is more credible because its author specializes in Michael's topic. hope i helped lol</span> :)