Final Answer:
A project is defined as:
a) A temporary endeavor undertaken to accomplish a unique product, service, or result.
Step-by-step explanation:
Option (a) accurately captures the definition of a project. A project is a temporary effort with a specific beginning and end that is undertaken to create a unique product, service, or result. Projects are distinct from ongoing activities (Option b) in that they have a defined duration and are not perpetual.
While successful completion within the specified time and budget is a common goal for projects (Option c), it's not the only measure of success. Projects can have flexibility in terms of timelines and budgets based on project requirements and constraints.
Projects typically have deadlines (Option d), and the absence of a defined endpoint would suggest a more continuous or ongoing initiative rather than a project.
The likelihood of success (Option e) varies and is influenced by various factors, including effective project management, stakeholder collaboration, and adaptability to changing circumstances.