6. Infer Some shortening products are described as "hydrogenated vegetable oil", which are oils that react with hydrogen in the presence of a catalyst. Form a hypothesis to explain why hydrogen reacted with the oils.

The answer options is d

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 .

A1 a 2 a 3 ooh lol i think that's it