Answer:
d.Is an integrated family of projects with a common strategic goal.
Step-by-step explanation:
A project portfolio refers to a set of programs or projects that an organisation embarks on and that is best managed as a collective set of work or integrated family of projects to accomplish a common strategic goal.
The project portfolio involves selection of the right projects to embark or focus on. It also involves on focusing on objective business goals for the common good of the organisation. By integrating projects, the project portfolio encourages collaboration rather than competition within the organisation. It also encourages a more efficient or effective way of managing resources within an organisation.