Which sentence uses modal verbs can or cannot correctly?

A. Liezl cannot sew fashionable dresses so she sells some of her finished products online.
B. Liezl can sew fashionable dresses so she sells some of her finished products online.
C. Liezl can sew fashionable dresses so selling them is not a good idea.
D. Liezl cannot sew fashionable dresses and she is good sewing.