Which of the following groups may operate in Class B airspace with the appropriate training and endorsements?

Operating in Class B airspace requires specific training and endorsements, which can be obtained by various pilot categories under certain conditions. The correct choice indicates that student pilots, recreational pilots, and sport pilots can access Class B airspace if they have received the required training and endorsements from a qualified instructor.

This means that these pilot groups are not restricted to only those who hold higher certifications, such as commercial or private pilot licenses, as long as they are trained specifically for the complexities of flying in Class B environments. The intent behind allowing these categories access is to ensure that all pilots, regardless of the level at which they fly, can navigate safely and competently in more congested airspace, where communication and awareness are critical due to the surrounding traffic and operational regulations.

Other groups mentioned do not reflect the ability of all pilot categories to gain access to Class B airspace with the appropriate training, thus making the choice of student, recreational, and sport pilots the most inclusive and accurate in this scenario.