The substitution effect is the change in the quantity demanded of a good that results from holding constant the effect of the price change on consumer purchasing power.

a. the tendency of people to be unwilling to sell something they own

b. a change in price making the good more or less expensive relative to other goods

c. a change in the price of a substitute for the good

d. an increase in the usefulness of a product as the number of consumers who use it increases

b. A change in price making the good more or less expensive relative to other goods.

The substitution effect says that as prices rise for one product, consumers will replace it with a similar less expensive alternative product.

Abigail Adams insisted her husband John Adams not to forget the role of women when  fighting for America' independence from Great Britain.

Explanation:

She mentioned that The new code of laws that are mentioned in the declaration of independence can be more generous to the nation and favorable to them as well.

She also mentioned that there shall not be any undue powers given to the husbands basically the males which would urge them to become despotic. If particular care and attention is not given to the ladies, then she would form a rebellion by making all the females come together. her letter was the first step which was focused on the equal rights of the women.