Which storage compatibility group contains bulk propellants?

Bulk propellants are classified under Group C, which is specifically designated for materials that may react during an emergency response, but their reactivity does not produce a major explosive hazard when stored under controlled conditions. This compatibility group can include various propellants used in the defense sector and aerospace applications.

Understanding the classification of storage compatibility groups is crucial, as it helps in determining safe storage practices and minimizing risks associated with hazardous materials. Group C's focus on bulk propellants emphasizes the necessity of careful handling and storage to prevent any adverse reactions, given that propellants themselves can exhibit explosive characteristics under certain conditions.

Each of the other groups (A, D, and E) pertains to different types of hazardous materials with unique risks and storage requirements that do not align with the characteristics of bulk propellants, making Group C the correct choice for this question.