An acid and a base are mixed and when the ph is the a. methyl red turns red b. alizarin yellow turns redc. bromocresol green turns blue d. bromothymol blue turns blue

If the indicator was a universal indicator, when it hits an acid, it'll turn red, when it hits a base, it'll turn blue. Considering you mixed both the acid and the base, it would make the universal indicator turn green. It would then make a "neutral". The answer is C;bromocresol green turns blue

I hope this helps! :D

heat or electricity in the atmosphere- c.