Final answer:
The three main elements standardized by the GHS around the world are General Hazard Symbols, including harmonized hazard classification, labels, and safety data sheets.
Step-by-step explanation:
The three main elements of GHS being standardized around the world are General Hazard Symbols, which is option C. The Globally Harmonized System, or GHS, is a system created to standardize and harmonize the classification and labeling of chemicals to ensure safe production, transport, handling, use, and disposal. The main components standardized through GHS include hazard classification criteria, consistent labeling elements, and safety data sheets designed for global use. This system aims to protect workers' health and the environment and ensure trade facilitation among nations with different sets of regulations.