Final answer:
Option b, 'Lower traffic congestion at terminals and gates,' is not a perceived principle advantage of privatization. Other options, such as capital infusion, tax conversion, and lower labor costs, are typically associated benefits of privatization.
Step-by-step explanation:
The question is about the principle advantages of privatization. Option b. Lower traffic congestion at terminals and gates is NOT a perceived principle advantage of privatization. Meanwhile, options a, c, and d are often cited benefits. Privatization can lead to capital infusion from diverse sources, conversion of public airports into tax-paying entities, and possibly lower labor costs. However, lower traffic congestion at terminals and gates is not directly related to privatization, as it is more influenced by operational management and physical infrastructure rather than ownership structure.
Furthermore, while privatization can lead to many economic benefits such as increased productivity and efficiency, it may also result in challenges such as higher prices, reduced access to services, and other socioeconomic issues as observed in different countries' experiences.