Question

why are professionals important for installing and maintaining plumbing systems? a they offer discounted plumbing services. b they can provide free plumbing advice. c they have access to fancy plumbing tools. d they ensure proper installation, and compliance with codes.

Explanation:

• Option A: Offering discounted services is not a core reason for the importance of professionals in plumbing system installation and maintenance, as their key value is not about cost - cutting on services.
• Option B: Providing free advice is not the main reason for their importance in the actual installation and maintenance work.
• Option C: Having access to fancy tools is not the primary factor. The main thing is their ability to do the job correctly.
• Option D: Professionals are trained to ensure that plumbing systems are installed properly and that all work complies with building codes and safety standards, which is crucial for the functionality and safety of the plumbing systems.

Answer:

D. They ensure proper installation, and compliance with codes.