As the porosity of a refractory ceramic brick increases A st

As the porosity of a refractory ceramic brick increases,
(A) strength decreases, chemical resistance decreases, and thermal insulation increases
(B) strength increases, chemical resistance increases, and thermal insulation decreases
(C) strength decreases, chemical resistance increases, and thermal insulation decreases
(D) strength increases, chemical resistance increases, and thermal insulation increases

Need help!!! please and thank you for your assistance!

Solution

A .strength always decreases ,chemical resistence decreases, and thermal condictivity must be reduced therefore themal insulation must increase.