If the hydroxide ion concentration is 10-7 M, what is the pH of the solution

Consider the story you just read. all but one of the choices below indicate that something is living.

How does carbon monoxide pose the greatest threat to humans? a. it can be produced by wood fires. b. it can be produced by home furnaces. c. it is produced by acid rain. d. it is produced by modern automobiles.

What the blanks in these lines are ?