When Bob is figuring the deduction for contributions made to his own SEP-IRA, compensation is his net earnings from self-employment, which takes the following into account: A. A reduction for all of Bob's self-employment tax and a reduction for the maximum allowable contribution to Bob's own SEP-IRA. B. A reduction for the maximum allowable contribution to Bob's own SEP-IRA. C. The deduction for one-half of Bob's self-employment tax and the deduction for contributions to his own SEP-IRA. D. A reduction for all of Bob's self-employment tax