All of the answers above are correct except:
<span>d. increased productivity
</span>
When long-term stress strikes, a person may feel the negative symptoms of the disorder which are evidenced by all of the three answers; whereas the last answer seems to be a positive effect.
I think the answer is a. 3
The words <em>could have been baking </em>are considered to be A) compound verb since it consists of more than one word.