Correct answer is D.
Any type of goal should be SMART (Specific, Measurable, Attainable, Relevant, Timely). In this case, improvement goal is time bound (need to implement in next sprint), attainable (few team members already did it in other projects), and specific (reduce the time taken for release process). This is not measurable because it is not mentioned by how much time release process should be reduced.
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