Which statement BEST described how imprinting varies over the course of development?
A) Imprinted alleles are permanently silenced from embryo development through adulthood.
B) Imprinting is only active during embryo development, but expression returns to normal during adulthood.
C) Imprinting is only active during gametogenesis, where alleles are selectively silenced before being transmitted to offspring.
D) Imprinting randomly flickers on and off during development.
E) Imprinted alleles differ by tissue type and time of development.
