Q: You are presented with the quiz "A positive impact on the environment can be from:" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "recycling has a positive impact on the environment" and "recycling is the reuse of material". So, what's the best answer to the question?

OPTIONS:
(a). creating plastics.
(b). drilling for oil.
(c). reusing materials.
(d). lowered energy cost.
(e). mining.
(f). water conservation.
(g). Time and energy.
(h). transportation technology.
A:
(c).