According to the Studies by Wackenagel Et Al

According to the studies by Wackenagel et al. and the World Wildlife Foundation:

A) humanity currently uses nature's renewable resources in a sustainable manner.
B) population growth will not lead humanity to use more of nature's renewable resources than nature has the capacity to replenish.
C) humanity is already using non-renewable resources at an unsustainable rate, but it is still keeping consumption of renewable resources within sustainable levels.
D) the human footprint on Earth has been shrinking because of technological progress.