What's the best answer to this question: does a change in price shift the demand curve?

OPTIONS:
- no
- yes
Answer: no

What's the best answer to this question: does the quinine in tonic water prevent malaria?

OPTIONS:
- no
- yes
Answer: yes

What's the best answer to this question: can you breed an alpaca with a llama?

OPTIONS:
- no
- yes
Answer:
yes