All of the following are properties of bases except a. bitter taste b. produces hydroxide ions in water c. produces hydronium ions in water d. slippery to the touch

The answer is D slippery to the touch

The correct answer is d

Ithink the answer is c i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .