Self-Incompatibility in Flowering Plants Is a Biochemical Recognition and Rejection

Self-incompatibility in flowering plants is a biochemical recognition and rejection process that prevents ____.

A) both self-fertilization and self-pollination
B) self-pollination and occasionally prevents self-fertilization
C) self-fertilization but not self-pollination
D) self-pollination but not self-fertilization
E) self-fertilization and occasionally prevents self-pollination