What Is a Keep the Green or Give the Green

What is a Keep the Green or Give the Green programme of Joie de Vivre Hospitality in San Francisco, California?

A) To introduce vegetarianism by offering healthful and delicious vegetarian menu choices that highlight organic vegetable, fruits and wine
B) To give guests options to reuse their towels and to encourage participation in a recycling programme
C) To encourages guests to think green when travelling, and offering healthful and delicious menu choices that highlight organic wines, local purveyors and on-site herb gardens is a natural extension
D) To support the use of mass transportation and offers hotel guests a reward (either a $20 gas-card from Chevron or a $20 carbon offset credit) to boost guest's awareness of green issues