These days, publishers in Ramistan of glossy Western-style magazines rarely need to worry about interference from the government — the magazines’ content promotes consumption, and convincing Ramistan’s emerging middle class to spend their money is a key component of domestic policy.
想问选项A的and convincing是修饰谁的呢?修饰content的话为什么可以在前面加and?
选项C为什么语法不正确呢?