设随机变量X的概率分布列为P{X = k} = (1/3)^k (k = 1, 2, 3)，则P{X = 2} =：

题目：设随机变量X的概率分布列为P{X = k} = (1/3)^k (k = 1, 2, 3)，则P{X = 2} =：
A. 1/9 B. 1/3 C. 2/9 D. 2/3