In paragraph 4, why does the author mention that eelgrass thrives in both the Arctic and in the northeastern United States? A. To show that environments with extreme temperatures rarely have any effect on eelgrass B. To identify the northern and southern limits of the range where eelgrass is found C. To support the author's statement that eelgrass is a particularly widespread kind of seagrass D. To cite evidence tending to disprove one view about the importance of temperature to the growth of eelgrass