question: What would change the color of litmus paper from blue to red?
choices.text: complex Pollution pathogens toxins stomata steroids A snake vinegar
choices.label: A B C D E F G H
formatted_question: What would change the color of litmus paper from blue to red? (A) complex (B) Pollution (C) pathogens (D) toxins (E) stomata (F) steroids (G) A snake (H) vinegar