Final answer:
The subject of this question is Social Studies, and the correct answer is 'd. is less than seven hours'.
Step-by-step explanation:
The subject of this question is Social Studies because it pertains to the working conditions and regulations for officers or magistrates. It is important to understand these regulations to ensure fair treatment and prevent overwork.
In the given information, it is mentioned that the officers work seven hours daily. Based on this, the correct answer to the question is d. is less than seven hours. This option states that officers shall not be scheduled to work more than seven hours in any 24-hour period, except under emergency circumstances.
This regulation aims to prevent excessive working hours and maintain a balance between work and personal life for officers.