The correct answer is D. allow them to thaw slowly.
It is best to let frozen vegetables thaw slowly, by either moving them from the freezer to the fridge overnight, or by leaving them on the counter at room temperature to defrost. Vegetables can also be thawed in the microwave, however this is not as healthy as naturally thawed vegetable. It is better not to directly directly bake, steam, or fry frozen vegetables, since they might get unevenly cooked and become soggy.
