Based on the given information, it is not possible to determine the author's belief about Palm Deira's size or its potential to attract tourists. Hence, options B and D cannot be inferred from the article. Moreover, there is no mention of the author's belief regarding Palm Deira's completion difficulty, so option C cannot be inferred either. Therefore, the only option that can be potentially inferred is option A: the author believes that Palm Deira will be the best of the three islands.
