Context: Cause I ' m through to the third round and I ' ve counted at least 7 who did n't make it this semester , which brings the grand total up to 11 . 11 out of 48 since last spring who ' ve been held back , dropped out or failed out . And some how I ' ve been left unscathed . But honestly , there were a few who did n't try . One who allegedly came to clinical with alcohol on her breath .

Question: What may have caused only 11 to remain this semester ?
Options:
0. Many of them were consuming alcohol .
1. None of the above choices .
2. Many of them could n't keep up with the challenges .
3. They were taking a break this semester .
Answer: 2