Every three months or so, stanley cleans the lint out of the long vent to his clothes dryer. it is a messy job that stanley hates. it is too bad that stanley has never heard of the casabella bendable dryer vent brush, a specially designed brush that would make his life a little easier. for stanley, the dryer vent brush is a(n) product because he doesn't know the product exists. select one:
a. unsought
b. heterogeneous shopping
c. exclusive
d. specialty
e. convenience