The specialty career that would be recommended for Miguel Perez is a pharmacy technician.
Since it was stated that Miguel's previous role is an administrative medical assistant, this means that, he will perform clerical duties in the hospital.
In order for him to expand his work, he should take the position of a pharmacy technician. A pharmacy technician is someone who works with the pharmacist and ensure that patients are given the appropriate medicine.
The pharmacy technician helps in labelling a prescribed medication for the patient and also supplies medicine to the patients.
In conclusion, Miguel Perez should become a pharmacy technician.
I would go with B considering he has never tried it he is with a group of guys telling how great it is and he wouldn't want to feel left out of that circle