Which structures identify the type of cell shown in the above diagram? A. I, II, V
B. I, IV, V
C. I, III, IV
D. I, II, IV, V
Please help!!

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 .

60.0 - there are 3 significant numbers

Bthats what im doing to and i figured it out it is b