In its discussion of expertise and problem solving, your text identifies the kind of scientists who are most likely to make revolutionary discoveries in their fields. this particular discussion suggests that may be more important than in creative thinking.

a. experience; structure
b. structure; experience
c. flexibility; experience
d. experience; flexibility

This particular discussion suggests that flexibility may be more important than expertise in creative thinking. Thus, C) is right.

Explanation:In expertise and problem-solving situations, the experience is a really important factor because once the subject pictures the problem he or she remembers his experience in similar situations, but it might happen that he or she has never passed through an identical situation. That's when flexibility or adaptability comes into action because he or she might not experience identical situations but very close ones, or situations in which the current variables and conditions match with experiences he or she had in his or her past but that are not identical. That is when flexibility lets the subject carry on the solving of the problem by establishing associations between 2 different problem situations.