The basic reasoning for A over E is the fact that the question asks about what the
"author" would agree to. Author only says part of the passage, the rest is about the critics' opinions.
Author -
While days of the chain gang are long gone, the effects of meaningful labor during imprisonment demonstrate marked benefits to both the prisoner and society. Some of these benefits take the forms of reduced recidivism, increased job skills and employability, and improved quality of life. In fact, corporations have hired jails to have their inmates perform work from manufacturing to telemarketing.
Critics - However, some critics argue that prisoners who work are little more than bonded slaves, earning nothing for their labor and forced to do work that may be beyond their physical or mental capacity. Others are more concerned about the economic factors of cheap, noncompetitive labor or issues involved in giving inmates responsibility for critical components of products or providing them with lists of addresses and telephone numbers.
Since the question is to agree with the author's opinion, only option A fits correctly with the author's opinion.
Answer - A