Gold is a widely known metal, often used for making jewelry. Pure gold is called 24-carat gold, but there is also 14-carat gold. Because gold is a soft metal, it is sometimes combined with another metal to harden it, such as copper. Fourteen-carat gold is named as such because 14 out of the 24 carats, approximately 60%, is gold and the remaining 10 carats, or 40%, is some other metal. Which of the following is the purpose of the passage above?

A. No competitions exist for the best mustache.

B. The writer is a professional barber.

C. The writer enjoys having a beard.

D. Mustaches cannot easily be styled.

A. Songs

B. Gratitude

C. Praises

D. Help

A. Patients who have a mild respiratory infection should consult a doctor.

B. This medication is intended to treat long-term respiratory illnesses.

C. Anyone taking this medication must have a doctor's recommendation.

D. If you have a respiratory problem, take this medication only if directed by a doctor.