What will be the impact on the demand for sweatshirts and tee-shirts due to an increase in the price of sweatshirts, considering them as complements in consumption?
a) The demand for sweatshirts will increase, and the demand for tee-shirts will decrease.
b) Both the demand for sweatshirts and tee-shirts will increase.
c) The demand for sweatshirts will decrease, and the demand for tee-shirts will increase.
d) Both the demand for sweatshirts and tee-shirts will decrease.