My systematic brain says I can span the two dimensions: science book procedures and painting skill conventions.10

Quite flexible, I switch between a microscope and brush;11

I find that others tend to choose and stick with only one.12

What do the microscope and brush symbolize, respectively?

A) The microscope represents science, and the brush represents art.

B) The brush represents science, and the microscope represents art.

C) The brush and microscope both symbolize different colleges the author wants to attend.

D) The microscope symbolizes the author's desires, and the brush symbolizes his inspiration.