Q: U.S. Defense Secretary Jim Mattis on Saturday slammed China's militarization of disputed South China Sea islands, insisting that weapons systems recently deployed in the area were meant to intimidate and coerce Beijing's neighbors. The comments came during a speech at the Shangri-La Dialogue, an annual Asian defense forum in Singapore. In the speech, Mattis laid out the broader U.S. strategy for a "free and open" Indo-Pacific region. "China's policy in the South China Sea stands in stark contrast to the openness our strategy promotes. It calls into question China's broader goals," Mattis said. Specifically, the Pentagon chief mentioned China's deployment of anti-ship and surface-to-air missiles, electronic jammers, and the landing of a bomber aircraft at the Paracel Islands off the coast of Vietnam. "Despite China's claim to the contrary, the placement of these weapon systems is tied directly to military use for the purposes of intimidation and coercion," Mattis added. Though much of the world is focused on an upcoming summit between North Korea and the United States, this year's Shangri-La Dialogue has focused primarily on the region's long-term future and how to deal with a more assertive China. Beijing has begun projecting power beyond its borders, most notably through the construction and militarization of islands in disputed areas of the South China Sea. China claims nearly the entire South China Sea, despite overlapping claims by countries including Vietnam, the Philippines, Brunei, Malaysia and Taiwan. Last week, the United States disinvited China from the Rim of the Pacific exercise (RIMPAC), a major international maritime exercise to be held later this year, citing Beijing's behavior in the South China Sea. Mattis on Saturday referred to that disinvitation as an "initial response" to China, but he did not outline any additional steps that might be taken. "The U.S. will continue to pursue a constructive, results-oriented relationship with China, cooperating when possible and competing vigorously where... According to the above context, answer the following question. What made Jim Mattis want to slam China?

OPT:
1). because of their breaking trade agreements
2). not enough information
3). because of their law against more than one child
4). because of their militarization of the South China Sea
A:
4).