Before a journeyman electrical worker's license is granted to an applicant by a governmental agency, the individual is tested primarily on his or her ? .

Explanation:

The individual are tested on their ability to check the working knowledge and ability to use code.  As the codes and lengthy and complicated one has to have a good acumen to learn and understand them. Moreover, incomplete knowledge of code to cause hazardous accidents and loss of life and property. Therefore, they are thoroughly tested for their knowledge and ability to use codes.

i wanna say it’s between b and d, leaning more towards b.

attach the statements so i can answer : )