A delivery tactic for outsourced projects is known as $\_\_\_\_\_\_,\_\_\_\_\_\_,\_\_\_\_\_\_\_,$ and $\_\_\_\_\_\_\_\_.$

a$.$

buy, test, retest, accommodate customer

b$.$

create, deliver, receive feedback, redeliver

c$.$

build, own, operate, transfer

d$.$

create, deliver, customer test, get paid

e$.$

unit test, regression test, system test, customer test, transfer