What do we mean when we say that Robert Frost’s simplicity is deceptive? (1.3. 00:23-00:44)

A．Frost’s poems look simple, direct and natural, but Frost was almost never as simple, direct and natural as he appeared to be.
B．Frost’s poems are never simple, direct and natural.
C．Frost’s poems are simple, direct and natural.
D．Frost’s poems never say much in little.‍