Regarding bladder neoplasia, squamous metaplasia differs from squamous dysplasia as the latter is/has:

A. well-differentiated tumor with broad-based invasive font

B. marked atypia distributed on wide areas of superficial urothelium

C. atypia is present

D. no atypia but marked degenerative epithelial changes

Please do not use chat terms. Example: avoid using "grt" instead of "great".