According to Figure 8.5, which of the following statements regarding Southern party affiliation is true?

a. Partisan affiliation has been evenly split between Democrats and Republicans since 1960
b. Partisan affiliation has diminished for both Republicans and Democrats since 2000
c. Partisan affiliation for Democrats has declined since 1964
d. Partisan affiliation for independents has declined since 2000
e. Partisan affiliation for Republicans has declined since 1992

c