[单选题]

A．ccording to the author, one of the driving forces behind M&A wave is _______ .
A． the greater customer demands
B． a surplus supply for the market
C． a growing productivity
D． the increase of the world's wealth

A．ccording to the author, one of the driving forces behind M&A wave is _______ .A． the greater customer demandsB． a surplus supply for the marketC． a growing productivityD． the increase of the world's wealth