Context: She told me to pick ones that were n't full . How I ' m supposed to know which ones are full and which ones still have open space is beyond me . I just threw some things out there , and finally we worked it out to this .

Question: Why did she tell me to pick ones that were n't full ?
Options:
0. Because I ' m supposed to know which ones are full .
1. Because I 'm supposed to know which ones still have open space .
2. Because I just threw some things out there .
3. Because the full ones are n't available .
Answer: 3