Why can different enantiomers of a drug like thalidomide have drastically different biological effects?

• A. Enantiomers have different solubility properties, affecting their distribution in the body.
• B. Enantiomers have different atomic compositions, leading to different interactions with biological molecules.
• C. Enantiomers have different 3D shapes, which can interact differently with chiral environments in the body.
• D. Enantiomers have different melting points, which influence their biological activity.

Answer: (C)