Absolutely! take for example: a friend is toxic, and you have to cut them out of your life even if you’ve known them for a long time. maybe it’s sad, but soon you’ll realize how stressful and difficult it was being friends with them. or maybe you make a mistake doing something — you lie to someone, you get yourself hurt, etc. you can always learn from your mistakes, and that’s what makes life easier
The answer is a. All you have to do is place the word in and see if it sounds right.
A because if you do not now what kinds of sharks are out there
B is a fact because it's just one point, whereas A, C & D are a point with an explanation- more likely a persons opinion.
Hope this helps!!