以下函数中时间复杂度最小的是（）。<br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/5fb5c4e3e03722aaa47125717f5ba13a.jpg"/><br/> B、<img src="https://static.zxtiku.com/wangke/imgs/topic/81cfcca6174cfbb1be6fc89a9cc2fec9.jpg"/><br/> C、<img src="https://static.zxtiku.com/wangke/imgs/topic/555ae63410f43bd6f9b4feec3fcf4bc5.jpg"/><br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/b3fdbb42113a1bd5a3fc519731b8ba07.jpg"/><br/> E、<img src="https://static.zxtiku.com/wangke/imgs/topic/ca359cee907992fa74574c4337878979.jpg"/><br/> F、<img src="https://static.zxtiku.com/wangke/imgs/topic/2ae8d2f2e18229e403ea98ea8d44cfbe.jpg"/><br/> G、<img src="https://static.zxtiku.com/wangke/imgs/topic/adbfeea60b5cf7dbc6ecebea580aefe6.jpg"/>