In the idiom \' in good feather \', we change \' good\' into \' high, full\' without changing meaning. This change of constituent is known as_____

A．the weather in most part of land is hot
B．The land has several famous volcanoes
C．Its people are of different nationalities from all over the world
D．Its people are very friendly

A．onomatopoeically motivated
B．morphologically motivated
C．semantically motivated
D．etymologically motivated