The answer is A
Using energy
Explanation:
Plants have been using light in this primal way for a large chunk of Earth's existence. But just how did they gain the ability to photosynthesize? The short answer is they stole it, about a billion and a half years ago, when single-celled organisms called protists engulfed photosynthesizing bacteria.
If Gabriel developed diarrhea as a result of taking an antacid, he's been taking an antacid that contains magnesium.
Magnesium will act as a laxative.
You point to someone specific and shout, "you call 911!" Then start infant CPR.
(If you just yell call 911, many times everyone waits for someone else to do it. It is best to assign someone specifically to do it.)
Hope that helps.