Which of the following statements best describes the major difference between prophase I of meiosis and prophase of mitosis?

AIn prophase I, tetrads of homologous chromosomes form and crossing over occurs.

BIn prophase, the nuclear membrane dissolves and spindle fibers attach to the chromosomes.

CIn prophase I, the chromatin condenses to form visible chromosomes.

DIn prophase, the replicated chromosomes are linked together as sister chromatids.