The passage implies that protectionism ______.

A
题目问的是：文章暗示了贸易保护主义什么信息？文章倒数第4段中提到“Raising trade barriers now, politicians, business leaders and campaigners agreed, would have a devastating impact.”意思是“政治家，商人领袖和竞选者一致同意，现在提高贸易壁垒将会造成毁灭性的影响”，由此可见不能实施贸易保护主义。故选A。