Controlled functions include which of the following?

The correct answer identifies controlled functions as those roles that involve significant influence over a firm's activities and interactions with customers. Specifically, significant influence functions pertain to individuals who have the authority to make decisions that can materially affect the performance or risk profile of the firm. Customer dealing functions are roles that directly engage with customers, influencing the services they receive and managing the relationships with them.

In the context of UK regulation, these roles are particularly important because they are directly tied to the firm's ability to conduct business responsibly and ethically. Recognizing which functions are controlled helps ensure that individuals occupying those roles possess the necessary qualifications, skills, and integrity required to uphold regulatory standards.

The other options, while relevant to professional conduct and governance frameworks, do not encompass the full scope of controlled functions as defined in regulatory practices. Acting with integrity is an essential principle but does not represent a function in itself. Governance and systems and controls are important aspects of organizational operation but do not specifically denote the controlled functions associated with regulatory oversight and compliance. Therefore, the selection of significant influence and customer dealing functions as controlled functions reflects a comprehensive understanding of roles that are under stringent regulatory scrutiny.