When entrepreneurs develop new products, other companies also experience growth because they immediately copy the successful product.
create many companion products.
try to develop their own products.
attempt to improve the product

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.

i think the answer is a and i hope this ; ))