Hey there!
Once someone makes the commitment to start their own business, they're likely going to spend more time on the business than any job they currently have. So, option C is out. The commitment will also require a lot of Ben and Alison and many of their days (and nights) will be spent working on their business, meaning that B is also out. Also, success or good reviews are never guaranteed to people who start businesses, meaning that A is out, as well.
That leaves D, which makes sense, since they will not have to go through an employer that takes fees and taxes out of pay before giving them their paycheck. Besides required income taxes, they will earn all profits.
Hope this helped you out! :-)
