An employee at a company is suffering from severe back injury, which is a covered disability. The employee comes to know of a vacant position in the company that involves only light lifting and requests his employer for a temporary transfer to that vacant position.
According to the Americans with Disabilities Act (ADA), which of the following statements is most likely to be true in this scenario?

a) Given that the vacant position exists, the employee's request to be transferred to that vacant position is considered to be an undue hardship for the employer.
b) Given that the vacant position exists, the employee's request to be transferred to that vacant position is considered to be a reasonable accommodation so long as the employee is otherwise qualified for the position.
c) As the back injury can affect the employee's work productivity, his employment can be terminated by the employer.
d) As the back injury can affect the employee's work productivity, his employment is contingent upon the cost of his treatment.