Final answer:
The correct service fee for Smart door locks cannot be determined without additional context regarding the provider or service specifics.
Step-by-step explanation:
The correct service fee for Smart door locks cannot be determined without additional context regarding the provider or service specifics. I cannot provide you with the specific service fee for Smart door locks without additional context. The service fee for installation or ongoing maintenance of Smart door locks can vary based on the company, the complexity of the system, and the services provided. Options a) $29.99, b) $34.99, c) $39.99, and d) $44.99 represent potential pricing for such services, but without knowing the particular details or service in question.
it is not possible to accurately determine which price is correct. If you have further information about the specific service or provider you are inquiring about, or if this is related to a specific homework or case study question, please provide that context so I can offer a more precise answer.