The correct answer is D. Red-tapism.
Red-tapism is a term used to describe excessive bureaucracy and adherence to formal rules and procedures, especially in government or other official organizations. It is often used to describe a situation where a process is made unnecessarily long and complicated by the need to follow a lot of rules and regulations.
Diplomacy is the art of managing international relations, especially in times of tension or conflict. It involves the use of negotiation, mediation, and other methods to resolve disputes and build relationships between countries.
Bureaucracy is the system of government in which officials are appointed to manage a country or organization. It is often characterized by a complex system of rules and regulations, and by a slow and inefficient way of doing things.
Nepotism is the practice of favoring relatives or friends in appointments or promotions, especially when they are not qualified for the job.
In the context of the question, the process is a long one because it involves too much official formality. This is an example of red-tapism, as the process is made unnecessarily long and complicated by the need to follow a lot of rules and regulations.