Final answer:
The first step in the decision-making process when selecting a healthcare service is to identify the healthcare service decision to be made. Therefore, the correct option is B.
Step-by-step explanation:
The first step of the decision-making process when selecting a healthcare service is to identify the healthcare service decision to be made. This involves determining the specific healthcare service or treatment option that is needed. Once this decision is clear, the next step is to gather information about the healthcare service to evaluate the available alternatives and make an informed decision. Therefore, option b. Identify the healthcare service decision to be made comes first in the decision-making process.