Sunshine has brought an assortment of shoes to the laboratory to see which ones maximize her comfort and control of the pedals of the laboratory pumps. She begins by working each of the pedals barefoot, then moves on to a pair of high-heeled sandals, a pair of mid-heeled thong sandals, a pair of flat-heeled thong sandals, a pair of flat T-strap sandals, and finally, a pair of thong-style Crocs sandals. Which will she prefer?