If A and $B$ are complementary goods, a decrease in the price of good A would:

a$.$ have no effect on the quantity demanded of $B.$

b$.$ lead to an increase in demand for $B.$

c$.$ lead to a decrease in demand for $B.$

d$.$ none of the statements associated with this question are correct.

e$.$ None of the above

Beef is a normal good. You observe that both the equilibrium price and quantity of beef have risen over time. Which of the following would be most consistent with this observation?

a$.$ Consumers have experienced an increase in income and beef$-$production technology has improved.

b$.$ The price of chicken has risen and the price of steak sauce has fallen.

c$.$ Consumer tastes have changed so as to prefer beef less than before.

d$.$ The demand curve for beef must be positively sloped.

e$.$ None of the above