Read the text. Then choose the correct answer for each question

Read the text. Then choose the correct answer for each question below. The World Health Organization says theres been a four fold increase in diabetes in the past four decades. World wide nearly one in 11 adults now has the disease. In one of the largest studies to date, its been found that poor and middle income countries had seen the steepest rise in cases. Thats prompted a warning that diabetes has reached levels that could bank rupt some health systems.
According to the passage diabetes
a)can be found only in poor and middle income countries.
b)is the desease of adults.
c)may be a serious problem to some health systems.
d)is the largest study to date.