24. Given that the radius of $\odot O$ is $10 \mathrm{~cm}, A$ is a point on $\odot O$, $B$ is the midpoint of $O A$, and the distance between point $B$ and point $C$ is $5 \mathrm{~cm}$. Then the positional relationship between point $C$ and $\odot O$ is ( ).
(A) Point $C$ is inside $\odot O$
(B) Point $C$ is on $\odot O$
(C) Point $C$ is outside $\odot O$
(D) Point $C$ is on $\odot O$ or inside $\odot O$
24. D.
$$
O C \leqslant O B + B C = 10 .
$$