Answer:
D). Divergent thinking.
Step-by-step explanation:
Divergent thinking is demonstrated as the thinking process that is primarily inclined towards producing creative as well as authentic solutions by exploring or examining a wide variety of proposed solutions.
In the given example, Susan is displaying 'divergent thinking' as she tests a number of possible alternatives and explore them('50 possible uses of a brick') in order to reach a new, authentic, or creative idea/solution('find new and unusual use of a brick'). Therefore, option D is the correct answer.