How do copyrights and patents promote the progress of science and useful arts

when in doubt choose c

it's what my teacher told my class when we were going into psats

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.