Answer:
D). are completely different from one another because while the theologian must be a believer in the tradition they study, the academic historical-critical scholar must be an atheist.
Step-by-step explanation:
The key difference that exists between the theological study and academic study of religion is that theology lays emphasis on studying the nature of God or other supernatural forces and faith associated to it while academic study focuses upon critically examining a specific religious belief or behavior from an outlander's perspective.
Thus, the theologian is necessarily a believer as he/she aims to understand how the character of transcendental forces(implying they believe it) while 'the academic historical-critical scholar must be an atheist' as then only he would be able to do critical study without any bias. Thus, option D is the correct answer.