The passage suggests which one of the following about material and cultural wealth? A. Because we can readily assess the value of material and cultural wealth, we tend not to take them for granted. B. Just as the biota is a source of potential material wealth, it is an untapped source of cultural wealth as well. C. Some degree of material and cultural wealth may have to be sacrificed if we are to protect our biological heritage. D. Material and cultural wealth are of less value than biological wealth because they have evolved over a shorter period of time. E. Material wealth and biological wealth are interdependent in a way that material wealth and cultural wealth are not.