Aristotle distinguishes four causes:
1. Material cause: what it is made of (here, bronze). → (A)
2. Efficient cause: the agent that brings it into being (the sculptor). → (B)
3. Formal cause: the form or design, the concept (the plan to have Poseidon's statue). → (C)
4. Final cause: the purpose for which it is made (worship or aesthetic purpose).
Option (D), the space in the temple, is not a cause in Aristotle's scheme. Hence, the correct causes are (A), (B), (C).
\[
\boxed{\text{Therefore, A, B, and C are Aristotle's causes.}}
\]