idea or belief for naturalism
Answer: B. Carmen refuses again and again to clean her room. Obstinate means to <u>refuse</u> to change your opinion, and REFUSING to clean your room seems to fit that description, keyword being refuse.
Explanation:
When blood pressure drops too low, the rate of baroreceptor firing decreases. This will trigger an increase in sympathetic stimulation of the heart, causing cardiac output to increase.
