Question: Determine which samples are independent samples.

A) Women given hormones for menopause; Women given placebos

B) Cordgrass monitored for survival on the left bank of a creek; Cordgrass monitored for survival on the right bank of a creek

C) Black willow tree cuttings monitored for survival at 7 days; Black willow tree cuttings monitored for survival at 14 days

D) Mothers who smoked during pregnancy; Their babies who developed asthma