设 $X \sim N\left(\mu_1, \sigma_1^2\right), Y \sim N\left(\mu_2, \sigma_2^2\right)$ ，这两个正态分布密度曲线如图所示．下列结论中正确的是
A
$P\left(Y \geq \mu_2\right) \geq P\left(Y \geq \mu_1\right)$
B
$P\left(X \leq \sigma_2\right) \leq P\left(X \leq \sigma_1\right)$
C
对任意正数 $t, P(X \leq t) \geq P(Y \leq t)$
D
对任意正数 $t, P(X \geq t) \geq P(Y \geq t)$
E
F