Which of the following is the proper sequence of steps in conducting an experiment with precision control matching?

a	Select a sample of research participants, match each participant with a partner who has the same value of matching variable(s), randomly assign each member of the matched partners to each group, administer the treatments to the groups, measure the dependent variable(s).
b	Select a sample of research participants, match each participant with a partner who has the same value of matching variable(s), administer the same treatment to both partners, measure the dependent variable(s).
c	Match each participant with a partner who has the same value of matching variable(s), select a random sample of research participants from the pairs, administer the treatments to the sample, measure the dependent variable(s).
d	Select a sample of research participants, randomly match each participant with a partner, administer the treatments to the partners, measure the dependent variable(s).