The correct answer is "select the best solution". After evaluating possible solutions, that is considering the advantages and degree of effectiveness of each solution, the following step is to choose the most suitable solution. The other option refers to previous steps in the creative problem solving process
Allusion is a figure of speech, in which one refers covertly or indirectly to an object or circumstance from an external context. For example, you might say to one of your guy friends, "Don't act like Romeo in front of her." that would mean you are referencing to Shakespeare's "Romeo and Juliet."