已知二维随机变量<img src="https://static.zxtiku.com/wangke/imgs/topic/2519a5f55fddbea44f8f82660e64ca70.jpg"/>的分布函数为<img src="https://static.zxtiku.com/wangke/imgs/topic/90311650723408e366c2f214592ddaf9.jpg"/>，<img src="https://static.zxtiku.com/wangke/imgs/topic/11eb917d4121d45f19bafc8493257cc4.jpg"/>是<img src="https://static.zxtiku.com/wangke/imgs/topic/1202f633eb8cbea86e93224ce087a270.jpg"/>和<img src="https://static.zxtiku.com/wangke/imgs/topic/24de74a1dde6c8f5f1b919945a1a5700.jpg"/>的边缘分布函数，则概率<img src="https://static.zxtiku.com/wangke/imgs/topic/650ee7c94475d89b65871ce0e0406fc6.jpg"/>可用分布函数表示为（）。 <p> A. </p><img src="https://static.zxtiku.com/wangke/imgs/topic/d6e6bb6e25f1a865a22641c6525e34af.jpg"/> <p> B. </p><img src="https://static.zxtiku.com/wangke/imgs/topic/7e3291a7193596c96c9f59d6cb85f90d.jpg"/> <p> C. </p><img src="https://static.zxtiku.com/wangke/imgs/topic/7798a60ea7b05d36d7e501e7fb87b2f3.jpg"/> <p> D. </p><img src="https://static.zxtiku.com/wangke/imgs/topic/083b3a73c03bc9337dd81524b517a986.jpg"/>