During the requirements definition phase of a software development project, the aspects of software testing that should be addressed are developing:

A.
test data covering critical applications.

B.
detailed test plans.

C.
quality assurance test specifications.

D.
user acceptance testing specifications.

Explanation:
A key objective in any software development project is to ensure that the developed software will meet the business objectives and the requirements of the user. The users should be involved in the requirements definition phase of a development project and user acceptance test specification should be developed during this phase. The other choices are generally performed during the system testing phase.