When a price hike for Big Gulps of GlugaChug from $1 to $2 improves sales of dehydrated water from 50 to 100 kegs, then the dehydrated water and GlugaChug are: (1) Joint outputs in the production. (2) Complements. (3) Substitutes. (4) Mixed resource alternatives.
Can someone please help me in finding out the accurate answer from the above options.