Enzymes work the best in certain pH conditions and ranges in regards to base and acidic. If the enzyme is no longer in that range, it could denature(change shape), which would lead to the chemical reaction not working. I hope this is right or helped!
39 divided by 94 equals .41489361702(continued) so 41% when rounded to the nearest tenth
If you look it up it tells you exactly what it is
B. Expressed the other ones won’t make any sense since she said it was ok