If a client pays $300 for a mixture of nuts consisting
entirely of c pounds of cashews, b pounds of brazil nuts,
and m pounds of macadamia nuts, which of the
following expresses b in terms of c and m ?

A) b = 100 - 4/3 (c+m)
B) b = 100 - 4/3 (c-m)
C) b = 100 + 4/3 (c+m)
D) b = 100 + 3/4 (c+m)