Which two numbers and two signs can be interchanged so as to balance the given equation?
`16 xx 4+12 div 4-15=59`

Options

A. 4 and 12, `xx` and `div`
B. 16 and 12, + and -
C. 15 and 16, `xx` and +
D. 12 and 15, + and -

Answer

B