Final answer:
Option B). An airworthiness directive (AD) is a safety requirement issued by the aviation authority of a country, which should be complied with if an airplane type is registered in Canada and is subject to the AD.
Step-by-step explanation:
An airworthiness directive (AD) is a safety requirement issued by the aviation authority of a country. It is usually addressed to the aircraft manufacturer and operators of a specific aircraft type, regardless of where it is registered. So, if an AD is issued for a foreign manufacturer and a specific airplane type, it should also be complied with if that airplane type is registered in Canada.
The compliance with an AD is mandatory in order to ensure the continued airworthiness and safety of the aircraft. It is the responsibility of the aircraft owner or operator to ensure compliance with all applicable ADs, regardless of the authority that issued them.
Therefore, the correct answer to your question is yes, the airworthiness directive should be complied with for an airplane registered in Canada that is also subject to the AD.