Select the most successful introductory statement.

Approximately eighty-five million tons of paper is used in the US each year.
Of the approximately eight-five million tons of paper used in the US each many could have been conserved by printing double sided.
US citizens do not do enough to conserve the natural resources.
Of the approximately eighty-five million tons of paper used in the US per year conservation efforts could have reduced consumption by up to twenty percent.