Which of the following statements about colony collapse disorder is False?

(a) A collapsing colony has very few adult worker bees, so the developing larvae cannot survive.
(b) It is the cause of major losses in numbers of honeybee colonies over the last several years.
(c) Causes of the phenomenon are now fully understood.
(d) It is characterized by worker honeybees abandoning hive despite presence of larval brood, honey, & queen.
(e) The phenomenon has dramatically increased in frequency since 2006.