Which statement most accurately compares the temperature of the core of the sun to its surface?
a) the core is more than a thousand times hotter than the surface
b) the surface is more than a thousand times hotter than the core
c) the core is more than a million times hotter than the surface
d) the surface is more than a million times hotter than the core

C) the core is more than a million times hotter than the surface

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 .