Which is the expected workflow for "Test-Driven Development"?
A . Write a new fating unit test, write the new functional code to fix the test, verify that the test passes, and then refactor the code.
B . Write a new test, validate with the CI system, and then write the new functional code.
C . Validate with the G system, write the new functional code, and then verify that the test passes.
D . Write a new failing unit test, write the new functional code to fix the test, and then verify that the test passes.
Answer: A