could i please have help with these two

Compared with perfect competition, a monopoly:

a.increases total economic surplus.

b.increases consumer surplus.

c.causes a deadweight welfare loss.

d.reduces deadweight welfare loss.

If buyers of a monopolistically competitive product feel the products of different sellers are strongly differentiated, then the demand for each seller's product is:

a.relatively price-elastic.

b.perfectly price-inelastic.

c.perfectly price-elastic.

d.relatively price-inelastic.