Ased on the chart, each of these is true except
a.in 2008, voters aged 50-64 received the most campaign e-mails.
b.e-mail is becoming increasingly important to election campaigns.
c.in 2008, people who voted for bush received more campaign e-mails than people who voted for obama.
d.in 2004 and 2008, college graduates were more likely to receive campaign e-mails than nongraduates.