Based on the graph, which of these conclusions is correct? (2 points)
a
Heat is not added in portions BC and DE.

b
Heat is not added in portions AB and CD.

c
Change of state takes place in portions BC and DE.

d
Change of state takes place in portions AB and CD.

Based on the graph which of these conclusions is correct 2 pointsaHeat is not added in portions BC and DE bHeat is not added in portions AB and CD cChange of st class=