In New Mexico Rainstorms Often Occur in the Summer Season

In New Mexico rainstorms often occur in the summer season (also known as "monsoon season") . Outside of summer, it is not uncommon to find umbrellas at reduced prices. Stores are likely reduce these prices to

A) encourage product trial.
B) stimulate demand.
C) give customers a good deal.
D) reduce sales fluctuations.
E) retain loyal customers.