题目8单选题
下列程序段的时间复杂度是( ). x=1; while(x<n) x=2*xA. O(<img src="https://tihai-oss-cloud.itihey.com/img/9d0553cdf09499c3739e421156b9f91c.png">)B. O(n<img src="https://tihai-oss-cloud.itihey.com/img/9d0553cdf09499c3739e421156b9f91c.png">)C. O(n)D. <img src="https://tihai-oss-cloud.itihey.com/img/8931b0db2b5b97c1fb2faa868a2d312b.png">