The correct answer is C. project.
A project is a temporary endeavor with a defined beginning and end (usually time-constrained, and often constrained by funding or deliverables), undertaken to meet unique goals and objectives, typically to bring about beneficial change or added value. The temporary nature of projects stands in contrast with business as usual (or operations), which are repetitive, permanent, or semi-permanent functional activities to produce products or services. In practice, the management of these two systems is often quite different, and as such requires the development of distinct technical skills and management strategies.
A programme is a set of projects managed in a coordinated way to achieve a common goal. Programmes are often used to manage complex projects that require a high level of coordination and integration.
Rules are a set of instructions that must be followed in order to achieve a desired outcome. Rules can be formal or informal, and they can be enforced by law, social pressure, or simply by the expectations of others.
Methods are ways of doing things. Methods can be formal or informal, and they can be based on experience, research, or tradition.
In the case of construction of a flyover, it is a project that requires the coordination of many different tasks and activities. The project must be carefully planned and managed in order to ensure that it is completed on time and within budget. The project team must also ensure that the flyover meets all of the necessary safety and environmental regulations.