The sentence which uses correct punctuation is C. In time, of course, all issues get resolved, but not necessarily in the way you would like.
In A, the comma before <em>he was concerned </em>should be a dash. In B, there should be a colon before <em>a flashlight, </em>not a semi colon. In D, there should be a comma before <em>yet, </em>and not a colon.
I looked it up and got 2 answers out of three possibilities
a. nonstandard usage
b. conversational speech
c. slang
some people said a while others said c
beautitul is something that pleases the
mind.... u are certainly a ugly person
1. You have to buy tea AND cake.
2. They are not good for you.