All shower compartments shall have a minimum finished interior area of ______ sq.m.

The minimum finished interior area for shower compartments is specified to ensure sufficient space for users to bathe comfortably while adhering to sanitary standards. The correct answer indicates that a shower compartment should have a minimum finished interior area of 0.60 square meters. This dimension is essential because it permits adequate room for movement and helps prevent water splashing outside the designated area, contributing to hygiene and safety within the bathroom environment.

The other options present higher minimum area requirements that surpass necessary regulations. While all dimensions aim to enhance user experience, the established standard of 0.60 square meters is recognized as adequate for providing a functional and comfortable shower space, balancing practicality and efficiency in design.