Answer: Normal good
Explanation:
A normal good is a good that has a positive correlation between its income and demand. This means that for a normal good, an increase in income will lead to an increase in the demand for the good while a reduction in income will also lead to a reduction in the demand for the good.
Cassandra bought 16 clothes when her income was $40000 but when her income reduced to $35000, she bought less of the good. That means that the cotton blouses bought by Cassandra are normal good.