Answer:
They are all supported.
Step-by-step explanation:
A evidence: "....unlike reptiles and birds, which lay eggs..."
B evidence: "...even tho they live in water..."
C evidence: "...A dolphin mother also feeds her bay milk like other mammals.."
D evidence: "...As mammals,dolphins breathe oxygen, even though they live in water..."
E evidence: "...Because it is a mammal, a dolphin mother gives birth to a live baby..."