Context: Perhaps it came loose itself with use . I tightened it and got back to work . When I switched to my straight stitch machine , again I found the foot had been unscrewed and was loose . While I do occasionally need to switch feet on this machine , I had done no sewing the day before that would have forced me to unscrew the foot to switch it out .

Question: How many machines do I have ?
Options:
0. The one with the loose foot and the straight stich machine .
1. Four machines all with loose foot .
2. None of the above choices .
3. Too many to count them .
Answer: 0

Question: What is the cause of my foot problem ?
Options:
0. It 's too old .
1. None of the above choices .
2. It 's not comfortable .
3. It 's too tight .
Answer: 1