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