Plants with a Dominant Sporophyte Are Successful on Land Partly

Plants with a dominant sporophyte are successful on land partly because

A) having no stomata, they lose less water.
B) they all disperse by means of seeds.
C) diploid plants experience fewer mutations than do haploid plants.
D) their gametophytes are completely enclosed within sporophyte tissue.
E) eggs and sperm need not be produced.