In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Which ingredient may cause chemical change? (A) almonds (B) milk (C) citrus juice (D) olive oil
C

A ship navigates with a magnetic compass because it is (A) predictable (B) unpredictable (C) waterproof (D) tradition
A

If pollution is caused by many things, it is least likely to be caused by (A) using styrofoam (B) pedaling forward (C) driving cars (D) smoking cigarettes

B