A decrease in the price of a complement in production leads to

A$)$ a decrease in the quantity supplied of the good in question.

B$)$ an increase in the supply of the good in question.

C$.$ a decrease in the supply of the good in question.

D$)$ no change in the supply of the good in question.

E$)$ an increase in the supply of the good in question and a decrease in the quantity supplied of the good in question.