If China were to seize one of Taiwan's outlying islands, the US would have few good options to respond without risking a major escalation and a war between the superpowers, according to the conclusions from a recent war game conducted by foreign policy and defense experts.The scenario, outlined in a report from the Center for a New American Security, began with China using military force to take control of Dongsha, a tiny atoll in the South China Sea between Taiwan and Hong Kong, where approximately 500 Taiwanese troops are stationed.This type of limited aggression could be a precursor to the seizure of other islands near Taiwan or an outright invasion of the democratically governed island as Beijing seeks to test and prod Washington's resolve to defend Taiwan.