What is the expansion for the acronym SMART used in specifying corporate objectives?

What is the expansion for the acronym SMART used in specifying corporate objectives? 










A. Specific, Measurable, Attainable, Relevant, and Time-bound
B. Structured, Manageable, Acceptable, Related, and Theoretical
C. Standardized, Manageable, Accountable, Relevant, and Targeted
D. Structured, Marketable, Accountable, Reusable, and Targeted












Answer: A