Formal style, it's pretty easy to figure that out by just canceling out the other answers. Slang is obviously not it, I don't see anything critical in this, and I don't know how it could be informal.
"<span>C. Three important dates in U.S. history are July 4, 1776; April 9, 1865; and September 11, 2001" is the best option but semi-colons can be used if wanted. </span>
Instead of that why not say something like
High schoolers have been warned about the dangers of football but even so it’s something that everyone knows of and enjoys whether it’s watching or playing. Football has some moments where it can get unsafe but it’s nothing too dangerous to stop the sport. If football was a safer sport it would take away from the uniqueness that football is. Its a sport that has danger to make it enjoyable and that makes it a good sport. Of course not every sport has to have some action that can be unsafe to be enjoyable, but the slightest of danger is exactly what makes football a game that will be here forever. I believe that parents should sign their children up for football since it’s considered a unique and fun sport. I disagree that football is too dangerous to the point where it needs to become safer.
I hope this helped :)
Answer: assuming that you're talking about richard wright Black's boy, The anecdote that he wrote told a story of a little boy's hardship to find food to fill his little belly. he wrote it to realistically portray the struggles that he endured as a child.
Explanation: If this helps please give me brainliest