In prokaryotes,mRNA is ____________.In eukaryotes,mRNA is _____________.

A)equally monocistronic and polycistronic;mostly monocistronic
B)equally monocistronic and polycistronic;mostly polycistronic
C)mostly monocistronic;equally monocistronic and polycistronic
D)mostly polycistronic;equally monocistronic and polycistronic
E)mostly polycistronic;mostly monocistronic