關於文法選擇 A World Heritage Site and one of the New Seven Wonders of the World, Machu Picchu is Peru's most visited attraction, welcoming hundreds of thousands of people a year. _______ tourism and the development of nearby towns continue to cause harm to the site, which is also home to several endangered species. _______的選項有: (A) Increasing (B) Increased (C) To increase (D) Being increased 答案是B,請問為何不能選A呢? 謝謝!