Which ones are the best answer for Integration Management?

a$).$an overarching function that coordinates the work of all other knowledge areas

b$)$ consists of preparing and managing the budget for the project

c$)$ define, gain written agreement for, and manage all the work required to complete the project successfully

d$)$ ensures that the project will satisfy the stated or implied needs for which it was undertaken

e$)$ identifying relevant interested parties to the project, understanding their needs and expectations, and engaging them appropriately throughout the project

f$)$ includes estimating how long it will take to complete the work, developing an acceptable project schedule given cost$-$effective use of available resources, and ensuring timely completion of the project

g$)$ includes identifying, analyzing, and responding to any effect of uncertainty related to the project objectives

h$)$ involves acquiring goods and services for a project from outside the performing organization

i$)$ involves generating, collecting, disseminating, and storing project information

j$)$ is concerned with making effective use of the people and physical resources needed for the project