Context: I ' m pretty confident I did good . Multiple Choice on a chem test is a weird thing . I mean asking me to caluclate answers is one thing but when you have to calculate then pick a letter it 's kind of weird . but it made some parts super easy .

Question: What would they have used to calculate an answer ?
Options:
0. Scientific calculator
1. Textbook
2. None of the above choices .
3. Smart phone calculator
Answer: 0