In May $2011,$ a study released by the global firm Boston Consulting Group $($BCG$)$ explained why some companies $($like Wham$-$O$,$ Inc., the toy manufacturer$)$ were moving production facilities out of China and back to the United States. What would explain this?rising wages in Chinarising wages in the United Statesa decrease in employee productivity in the United Statesan increase in employee productivity in China