A Gallup Poll in May 2010 showed that 669 out of 1029 randomly chosen adults said that the death penalty was "morally acceptable." In 1996, the rate of support for the death penalty was 78%. Using the date from 2010, we want to test if the rate of support has decreased since 1996. Find a condition that we do NOT need to check for the test.

Select one:

a. The samples should be randomly collected.

b. The population size should be larger than 10 times of sample size, n.

c. The samples must follow the normal distribution.

d. The sample size should be large enough to satisfy n x p > 10 and n x ( 1- p) > 10.