Dan has a board that is 8
3
4
feet long. He cuts off
4
5
6
feet and says he has
4
1
12
feet left. Which of the following explains whether Dan is correct?

A.
Dan is correct, because
8
3
4
−
4
5
6
=
4
1
12
.

B.
Dan is not correct, because
8
3
4
−
4
5
6
=
3
1
4
.

C.
Dan is not correct, because
8
3
4
−
4
5
6
=
3
11
12
.

D.
Dan is not correct, because
8
3
4
−
4
5
6
=
4
3
4
.