45.“Good” fires are ecologically crucial, clearing out dead bush and returningnutrients to the soil.
(A)Ecologically speaking, fires can never be good considering theirdestructive power.
(B)Fires are important to the environment in the way they help keep goodsubstances from going into the ground.
(C)Some fires are good and ecologically essential because they turn thescorched dry trees into nourishment in the earth.
(D)It is considered positive to extinguish fires that burn down useless treesand reserve nutrients for valuable ones.