Which of the following statements is true of user acceptance testing $($UAT$)?$

Select one:

a$.$ UAT involves linking individual components together and testing them as a group to uncover any defects in the interface.

b$.$ A goal of UAT is to determine the work load at which systems performance begins to degrade.

C$.$ UAT must be completed successfully before newly developed software can be rolled out to the market.

d$.$ UAT is often done by independent testers who were not involved in developing program code.