Answer:
Option C, a compound with the same three-dimensional shape as part of the hormone
Explanation:
A synthetic or artificial drug that is to be used at the place of original chemical compound behaviour must mimic the function of the compound by providing reactive sites and surface for enzyme interaction. In order to achieve this, the synthetic drug must have similar three dimensional structures with high specificity to the enzyme involved in the desired process at the binding sites for producing similar results.
Hence, option C is correct