It is "A"

A should be the correct answer.
The people and the structure of the organization mainly support the vision and direction of the organization. With the evolving environment, technology, capability of the individuals there is a lot of transformation in the structure, size and complexity of the organization.

Organization structure evolves to suit the evolving scenarios of the organization. The roles & responsibilities, the authority & accountabilities, collaboration and communication, technology enablement, processes, practices, policies all of these contribute to the evolution of the organization structure.
https://www.knowledgehut.com/tutorials/itil4-tutorial/itil-four-dimensions-it-service-management, the Organization and People dimension

I would say A is correct.