. In which one of the following sentences ia an abbreviation used correctly?

A. I had to go to the Dr. on Monday
B. Martin is a member of Parents for Responsible Teens (PRT)
C. His birthday is Sept 28.
D. Keep the bandage on for at least 3 hrs.
Answer (b)

Right.

okay thanks I was just checking my answer's because I got that one wrong on the exam

You're welcome.

The correct sentence that uses an abbreviation correctly is B. "Martin is a member of Parents for Responsible Teens (PRT)."

To identify the correct answer, you need to look for a sentence where the abbreviation is used in a proper and appropriate manner. Let's go through the options provided:

A. The sentence "I had to go to the Dr. on Monday" uses the abbreviation "Dr." for "doctor." In formal writing, it is generally preferred to use the complete word "doctor" instead of the abbreviation.

B. The sentence "Martin is a member of Parents for Responsible Teens (PRT)" uses the abbreviation "PRT" properly. It introduces the abbreviation in parentheses after spelling out the full name "Parents for Responsible Teens." This format is commonly accepted in written communication.

C. The sentence "His birthday is Sept 28" uses the abbreviation "Sept" for "September." It is commonly accepted to use the abbreviation for months in informal writing but not in formal writing. However, there should be a period after the abbreviation, like "Sept."

D. The sentence "Keep the bandage on for at least 3 hrs." has no abbreviations.

Therefore, the correct answer is B. "Martin is a member of Parents for Responsible Teens (PRT)."