Which statement about sustainable development is best described by the model? Sustainable development must protect the environment, while people’s social and economic needs are less important.

Sustainable development must meet people’s social and economic needs, while protecting the environment is less important.

Sustainable development must either meet people’s social needs, meet economic needs, or protect the environment; all three goals cannot be met at the same time.

Sustainable development must protect the environment, provide for people’s needs, and be economically viable.