Solution
= Solution
Yes. Conditioning on $D$ blocks $C\leftarrow D\to A$, while $C\to M\leftarrow A$ is blocked at the collider $M$. Therefore $C\mathbin\perp A\mid D$.
= Solution
Yes. Conditioning on $D$ blocks $C\leftarrow D\to A$, while $C\to M\leftarrow A$ is blocked at the collider $M$. Therefore $C\mathbin\perp A\mid D$.