Step 1: Inspect structure.
The artefact is metallic and shows clear manual shaping: long thin rods hammered and shaped into animal form.
Step 2: Techniques used.
- Forging: Heating and hammering the base metal.
- Bending: To shape legs, body, horns.
- Punching: To create small holes or textures.
- Twisting: For the curved, spiral horns.
Step 3: Eliminate wrong options.
- (B) Casting not used (no moulding marks).
- (C) Drilling not evident.
- (D) Casting again irrelevant.
Thus, (A) fits perfectly.
Final Answer:
\[
\boxed{\text{A}}
\]