What is the main defining feature of cradle to cradle? O a} regenerative design approach to the design of products and systems and aims to maximize waste and improve through a linear process of re-use .3' b) a methodology that has been designed to perform holistic analyses of complex systems ' _.3' c) design approach to the design of products and systems and aims to maximize waste through a cycle process of discard =.___,3' d} regenerative design approach to the design of products and systems and aims to minimize waste and improve through a cycle process of re-use