I believe the answer is 35-39 but you didn't give the full answer to d so that could be the correct one.
They engaged in <span>piecework
</span><span>piecework refers to the amount of payment that made based on the amount goods/service created.
This type of payment is very common in freelancing projects which being done by workers that is not in company's payroll.</span>
They would kidnap colored people, tie their feet with rope and drag them behind them while tied to a horse(or automobile).