Nanotechnology allows the manipulation of atoms and molecules to form structures on the scale of nanometers, or billionths of a meter. These "nanostructures" are now being used to augment already-extant goods. For example, to prevent the stench associated with athletic apparel, some fabrics contain nanostructures that soak up and neutralize odor-causing hydrocharbons, and then release them when washed. Scientists' insight into nanostructures is still nascent; thus, ________________________.



a. studies on reinforced fabrics are getting underway

b. incremental improvements are being made to current products

c. the future utility of nanotechnology is uncertain

d. the effect of a new fabric incorporating nanostructure remains unclear





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