Let's look at each sentence briefly: - Sentence A states, "Green managements are about the environment and sustainability." This is a broad, defining statement and works well as the opening (or topic) sentence. - Sentences C and D begin with "It can ..." and are clearly linked to the idea introduced in A. In C the focus is on how green management brings about change in company operations (making products, facilities, etc., "green"), and in D the focus is on converting the sustainability business into a competitive edge. Logically, one would expect the paragraph first to explain that the green management approach leads to internal (operational) changes (C) and then that these changes eventually give rise to overall business advantages (D). - Sentence B says, "Adopting green innovation by companies and organisations keeps the environment healthy and clean." This looks like an important supporting example that underscores one benefit of putting green management into practice. Although one might expect such an example earlier, among the given options its placement as the final sentence is the best available way to complete the thought. Putting these ideas in order we get: A - The topic sentence introducing green management. C - Explaining that green management brings about major changes in operations. D - Pointing out that these changes convert the sustainability business into competitive advantages. B - Adding the key example that adopting green innovation helps keep the environment healthy and clean. That is the order A, C, D, B which corresponds to Option A. Thus, the correct order is Option A (ACDB).