The sentence in which parentheses are used correctly is D. Uncle Travis’s vegetables (especially the corn) are famous for their flavor.
Parentheses are utilized in order to enclose incidental or extra information, including a passing comment, a minor example or addition, or a brief explanation. The writer may choose to write additional information within parentheses or to set off the text using dashes or commas.
I totally agree with this statement. It's an insecurity that many people have. People feel the need buy things just to impress other people. Like it doesn't make anyone better regardless of your status. Nice things are cool and all, but to most people; thats all they care about.