It Seems That Every Few Weeks Another Corporate Merger or Acquisition

It seems that every few weeks another corporate merger or acquisition occurs.The factor that has facilitated this is that:

A) governments have decreased the amount of oversight they have over corporations
B) businesses want to diversify to acquire ones in different industries
C) corporations are much cheaper to acquire now
D) governments see that it as easier to regulate only a few companies that have merged rather than several corporations that are competing against one another
E) government mandates