The carpenter came to install the new flooring in the Stephenson's kitchen two weeks ago. Once he had removed the old flooring, he announced he needed to go get a sander to smooth out the subflooring. He has not been back. A person who is a passive type when it comes to complaining would react to this by.

Firing the first carpenter and hiring another one who is willing to complete the job

Explanation:

People who are a passive type in a complaint tend to avoid confrontation. They tend to believe that confrontation in business does not worth their time and attention.

Whenever these people felt unsatisfied toward the work result conducted by others, they will try to cut out the business transaction that they have without making an effort to negotiate.

In the case above, rather than calling the first carpenter and ask why he is not completing the job , he is most likely to fire that person and hire the new one who is willing to do as he wants.

b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.