A randomized clinical trial was conducted to compare change in body mass index one year after randomly assigning subjects to a Mediterranean diet or the South Beach diet. Which of the following would be the appropriate statistical test for this comparison?

	A.	A one-sample t-test.
	B.	A one-tailed t-test for two independent samples
	C.	A two-tailed t-test for two independent samples
	D.	A t-test for dependent samples