Which Statement Is Correct About Flowable Composite Resins

Which statement is correct about flowable composite resins?

A) They are useful for class I but not class V restorations.
B) They are useful as liners in large cavity preparations because they adapt to the preparation better than more viscous materials such as hybrid and packable composites.
C) They are high-viscosity,light-cured resins that may be lightly filled (about 40%) or more heavily filled (up to 70%) .
D) They have a high elastic modulus,which allows them to cushion stresses created by polymerization shrinkage or heavy occlusal loads.