Why should pharmacy technicians be able to calculate the duration of a prescription if this information isn't provided?

a. it makes it easier to label the medication for the patient.
b. it isn't necessary to know the duration of a prescription if this wasn't indicated on the prescription.
c. for the purpose of packaging the medication more effectively for storage at home
d. it's important to know when a refill is due as well as indicating to the pharmacy staff that medication is being used correctly.

A. It makes it easier to label the medication for the patient.  

Pharmacy technicians should be able to calculate the duration of a prescription so that labelling of the medication for the patient is easy. Patient needs to take correct dosage and also up to the required number of days or months. If the pharmacy technicians are experienced enough then they have enough idea about the dosage and the time period of the medicines.

The correct answer would be option A, It makes it easier to label the medication for the patient.

Explanation:

Pharmacy technician is a person who works in a medical center or store and provides medicines to the people who come to them and show them prescription and need medicines. Pharmacy technicians are responsible for the proper packaging of the medicine, labeling the medicine, taking part in the compounding medication, etc. So calculating the duration of a prescription is important for a technician because it makes it easier for him to mark the medicine for the patient. In this way, patients can use the medicines easily without any problem.