The answer to c makes no sense at all since the absolute humidity doesn't change with altitude, the relative humidity does. The first part of d is correct, but the clouds equally shade all the area below the clouds, so this is incorrect. This question is similar to study guide question 18. Forest fires put out a lot of heat, increasing temperature. Burning biomass adds particles to the air, increasing cloudiness.
Trees contain a lot of water, which when burned, turns into water vapor and increases humidity.
The removal of a large patch of trees will change the wind patterns since the trees will no longer act as a wind barrier. The hotter water-laden air coming from the cooling tower will be less dense and will lift upwards, changing wind. Parking lots will collect heat during the day, leading to more heat irradiation and increasing temperature. The existence of the parking lot does not allow the water from rain to soak in, so more will evaporate and increase humidity. Several people mentioned the creation of particles from bulldozing, but the bulldozing and removal of vegetation are not indicated in this problem, so points were subtracted for adding information to the question.