Step 1: Define desirable qualities of a good healthcare system.
Step 1: Quality healthcare is defined by ideal characteristics. The task is to identify these positive attributes.
Step 2: Assess each term.
Step 2:
(A) Appropriateness: Care is relevant to the patient's needs and based on standards. This is desirable.
(B) Adequacy: Care is sufficient to meet the patient's needs. This is desirable.
(C) Apprehension: This is negative patient emotion, not a care characteristic.
(D) Affordability: Patients can pay for care without financial hardship. This is a critical characteristic.
Step 3: Determine correct characteristics.
Step 3: Appropriateness (A), Adequacy (B), and Affordability (D) are all positive and essential healthcare characteristics. Apprehension (C) is not. Therefore, A, B, and D is the correct combination.