I believe it is the first one im sorry if im wrong
The answer is 1 and 2/12th first you take the 2/3 into 8/12 and and the 2/4 into 6/12 and then you add them together to get 14/12. Then you simplify is to 1 and 2/12 and 2//12 into 1/6. I hope this helps.
My answer is C. hurt because it sound like the story is like that
It is useless because the material is not good enough for the tasks they are different silks