What Provisions Did the Clayton Act Include to Clarify and Expand

What provisions did the Clayton Act include to clarify and expand upon the Sherman Antitrust Act?

A) It created an organization to protect consumers and businesses from unfair competition.
B) It limited mergers and acquisitions that have the potential to stifle competition.
C) It provided specific exemptions to utility and other similar industries, which tend to have natural monopolies due to the exorbitant costs involved with starting up.
D) The Clayton Act actually made most of the provisions of the Sherman Antitrust Act null and void rather than expanding on the earlier legislation.
E) It specified that one person could be a member of only three boards of directors within the same industry.