Most climate scientists agree the main cause of the current global warming trend is human expansion of the "greenhouse effect"1 — warming that results when the atmosphere traps heat radiating from Earth toward space. Certain gases in the atmosphere block heat from escaping.
Based on this exert, I'd say Option C
A person who exhibits a blood pressure of 134/82 mmhg would
likely have a pulse pressure of beats/min ranging from sixty to seventy beats
per minute in which a person would likely receive as a pulse pressure when he
or she has a bp of 135/82 mmhg
Your answer would be: A. because scientists use what they have to create a theory, a theory is pretty much an educated guess is what a teacher would say, the theory would need to have evidence in order for it to be an educated guess. The scientist would have to come up with an explanation in order for the theory to work, or be an educated guess.
