Final answer:
In Christian theology, Jesus is said to have freely offered himself as both priest and victim, which indicates that he willingly chose to sacrifice himself for the sins of humanity. The term freely is most commonly used, making option A) freely the best answer.
Step-by-step explanation:
The question is asking which adverb best completes the sentence about Jesus' actions as described in Christian theology. In many Christian doctrines, it is accepted that Jesus freely offered himself as both priest and victim. This is to say, Jesus willingly chose to sacrifice himself for the sins of humanity. Each of the options A) freely, B) voluntarily, C) willingly, and D) unconditionally could be seen as synonymous in this context, but the most commonly used term in theological discussions is freely. Hence, the most appropriate answer to the question is A) freely