Bella intends to post this paragraph on a site for teen scuba divers:
Divers who descend to great depths and then come to the surface too quickly may experience a painful condition caused by bubbles of nitrogen gas in the blood or tissue. If a diver rises slowly, the air pressure weighing upon the diver decreases gradually, and she breathes out nitrogen naturally. But if the diver rises too quickly, her blood can no longer hold its dissolved nitrogen. Bubbles of nitrogen gas form and travel through the body, accumulating in joints such as elbows and knees.
Which detail would provide a logical conclusion for the paragraph, making the writing coherent?
A.
Divers may experience headaches, nausea, vomiting, and even seizures.
B.
Sometimes the pain is so great that the diver doubles over, a condition called “the bends.”
C.
Junior open-water divers ages 12 to 14 learn how to avoid the bends during their certification course.
D.
Nitrogen was discovered in 1772 by a Scottish physician.