设某产品的价格与需求的关系为<img src="https://static.zxtiku.com/wangke/imgs/topic/3cdbc9a7881f19c8a0e9ef4107f6c009.jpg"/>，总成本函数<img src="https://static.zxtiku.com/wangke/imgs/topic/513184edbc0d2f3e4f666f47fdbe8922.jpg"/>，求当产量和价格分别是多少时，该产品的利润最大？<br/> A、产量：<img src="https://static.zxtiku.com/wangke/imgs/topic/91eed3216ce2ede49765b291837ca15a.jpg"/>个单位，价格：<img src="https://static.zxtiku.com/wangke/imgs/topic/cf2ba8fac733f7d7bab30627b9e19747.jpg"/>元/单位<br/> B、产量：<img src="https://static.zxtiku.com/wangke/imgs/topic/91eed3216ce2ede49765b291837ca15a.jpg"/>个单位，价格：<img src="https://static.zxtiku.com/wangke/imgs/topic/aa2cb7f48b12f193d072a4415838f815.jpg"/>元/单位<br/> C、产量：<img src="https://static.zxtiku.com/wangke/imgs/topic/2307544ec41812a249609edf5ecb7a5a.jpg"/>个单位，价格：<img src="https://static.zxtiku.com/wangke/imgs/topic/aa2cb7f48b12f193d072a4415838f815.jpg"/>元/单位<br/> D、产量：<img src="https://static.zxtiku.com/wangke/imgs/topic/91eed3216ce2ede49765b291837ca15a.jpg"/>个单位，价格：<img src="https://static.zxtiku.com/wangke/imgs/topic/8f66c30e4dbd071acd58604baa3e93d2.jpg"/>元/单位