Final answer:
White Collar Crime has generally increased over the last 30 years due to advancements in technology, a greater focus on regulatory enforcement, and the increased complexity of the financial system.
Step-by-step explanation:
The question of whether White Collar Crime has increased, decreased, remained constant, or fluctuated over the last 30 years is best answered by looking at trends. Based on available data, White Collar Crime has increased over the last 30 years. This increase can be attributed to several factors, including advancements in technology that provide new opportunities for fraud, a greater focus on regulatory enforcement catching more crimes, and the increasing complexity of the financial system.
While it's challenging to track all incidents of White Collar Crime due to its often concealed nature, larger enforcement actions and high-profile cases indicate a pattern of growth in this area. Moreover, as globalization has expanded the reach of businesses and financial transactions, it has also created new avenues for White Collar Criminals to operate across borders, making these crimes more prevalent and complex. Thus, answer 'a' - increased - correctly describes the general trend observed over the last three decades.