Which Scenario Illustrates the Use of a Within-Subjects Design

Multiple Choice

Which scenario illustrates the use of a within-subjects design?

A) The artistic abilities of males are compared to the artistic abilities of females.
B) Children at three different age levels are given a test of their motor coordination.
C) Participants are given a spelling test,asked to meditate for ten minutes,and then given another spelling test.
D) One group of participants is given a compliment before solving problems and a second group is criticized before solving problems.