The primary advantages of agile development methodologies include:

a$.$ The ability to better incorporate scope changes during the project life cycle

b$.$ Improved ability to solidly plan the entire project life cycle in great detail

c$.$ Better interaction and integration of project stakeholders$/$customers

d$.$ Allows for a clear hand$-$off of project deliverables from phase to phase

e$.$ All of the above

f$.$ Only a and c

g$.$ Only b and d

h$.$ Only a$,$ b$,$ and d