Always go with the second greatest. it has more of a consistent vibe so personaly id go with C
Answer: The arteries (the aorta)
For both ectotherms and endotherms, metabolic rate tends to increase as mass increases
As the masses of the dinosaurs increase, how do their metabolic rates change? How does this compare to living animals?
>> As with living animals, the higher a dinosaur’s mass, the higher its metabolic rate.
Endocrine signaling is hormone based signaling that travels through the blood stream. Many of the sensors and integrating sensors of the endocrine system are located in the brain. The brain barrier contributes to endocrine signalling, such that the brain barrier does not factor in with endocrine signalling. The answer is A
