2. Given three points $A(-2,1)$, $B(-3,-2)$, $C(-1,-3)$, and a moving line $l: y=kx$. When the sum of the squares of the distances from points $A$, $B$, and $C$ to the line $l$ is minimized, which of the following conclusions is correct? ( ).
(A) Point $A$ lies on the line $l$
(B) Point $B$ lies on the line $l$
(C) Point $C$ lies on the line $l$
(D) Points $A$, $B$, and $C$ do not lie on the line $l$