Hey! I need a little help with this question. I initially said B but i'm not completely sure that it's correct. Thanks!

The right circular cone shown has a radius of meters and a constant height of 6 meters. The lateral surface area of the cone, in square meters, is given by S(r) = x 36+ + r*. At the instant when the radius is 0.75 meter, the radius is increasing at the rate of 1.15 meters per minute. At what rate is the lateral surface ares of the cone changing, in square meters per minute, at that instant? (A) 14.247 (B) 16.384 (C) 19.288 (D) 22.182