Context: I find life hard enough . But here I am , doing a spring " cleanse . " I am cranky because I am exhausted . I am exhausted - or feeling my exhaustion - because all I ' ve been drinking is green tea , and not my usual 2 large cups of coffee in the morning plus limitless cups of black tea throughout the afternoon , and then decaf black tea in the evening .

Question: Why is the narrator so tired ?
Options:
0. They are without sleep since Spring started .
1. They are without sleep .
2. They are without caffeine .
3. None of the above choices .
Answer: 2