版上大大午安, 小弟最近寫到一題, 百思不得其解 想請問版上的大大, 問題如下 The main cause of low per capita income is ? A a low level capital B a small workforce C low productivity of capital and labor D slow growth of capital and labor shares of income E none of above 答案為C 想請問版上的大大 為什麼A不行 然後為什麼C是正確的,感謝!!