By 2003, the media was concentrated in the hands of how many multinational corporations?

One

Ten

One hundred

One thousand

The correct answer here is the second option.

The concentration of media ownership is a known process where there is less and less individuals or groups that have a share in the mass media. By 2003, the mass media was concentrated that is, owned by only 10 multinational corporations. The biggest media corporation today is Comcast Corporation as of 2015.