Which of the Following Cases Best Describes an Insight Solution

Multiple Choice

Which of the following cases best describes an insight solution to a problem?

A) Solving problems that require retrieval of pertinent information from long-term memory
B) Arriving at solutions methodically by developing a step-by-step problem-solving technique
C) Generating solutions using rules of thumb developed through past experience with similar problems
D) Generating solutions from a sudden, often unexpected realization or comprehension