A problem$-$solving agent, assuming the agent

always has access to information about the

environment, which of the following four$-$phase is

most appropriate in a problem$-$solving process:

a$)$ Problem parameters, problem identification, problem$-$solving

steps, and solution outline

b$)$ Goal naming, goal formulation, goal plan, and goal arrival

c$)$ Goal formulation, problem formulation, search and a solution

d$)$ Goal formulation, problem formulation, search and execution

e$)$ All of the above