What Technique Did Both Major Political Parties Employ with Great

What technique did both major political parties employ with great success in recent elections to encourage voting participation?

A) Voting by mail was made available to all voters.
B) Transportation to voting booths was made available to most voters.
C) Online voting was made available to voters.
D) Voters are invited by people in their communities to participate.
E) Cash donations were made to local civic organizations.