Which of the Following Research Situations Would Be Most Likely

Multiple Choice

Which of the following research situations would be most likely to use an independent-measures design?

A) Examine the development of vocabulary as a group of children mature from age 2 to age 3.
B) Examine the long-term effectiveness of a stop-smoking treatment by interviewing subjects 2 months and 6 months after the treatment ends.
C) Compare the mathematics skills for 9th-grade boys versus 9th-grade girls.
D) Compare the blood-pressure readings before medication and after medication for a group a patients with high blood pressure.