Which Statement About Insect Flight Is True

Which statement about insect flight is true?

A) In order to fly, all insects require high abdominal and high thoracic temperatures.
B) In order to fly, all insects require high thoracic but not high abdominal temperatures.
C) In order to fly, all insects require elevated flight muscle temperatures.
D) Some insects can fly despite low abdominal and low thoracic temperatures.