双边序列的收敛域是( )。 A. <img src="https://static.zxtiku.com/wangke/imgs/topic/f8bb233079dc1d44148a13e86bccaa36.jpg"/> B. <img src="https://static.zxtiku.com/wangke/imgs/topic/a99fa5af0b886809d83a23a91ff24add.jpg"/> C. <img src="https://static.zxtiku.com/wangke/imgs/topic/952af3aa035c7ac4c4db30e2f39b4129.jpg"/> D. <img src="https://static.zxtiku.com/wangke/imgs/topic/50fc06f86c0d9134a54fa73efa897ca3.jpg"/>