Which Statement About Surfactants Is True

Which statement about surfactants is true?

A) Lung surfactant is a sticky substance similar to mucus.
B) Surfactants increase the cohesive forces between water molecules.
C) Certain cells in the diaphragm produce surfactants to increase its elasticity.
D) Increased surface tension caused by surfactants reduces the amount of effort required to inflate the lungs.
E) Premature infants suffer respiratory distress syndrome if natural surfactants are not present within the lungs.