Which expression is equivalent to [tex]30\left(\frac{1}{2}x - 2\right) + 40\left(\frac{3}{4}y - 4\right)[/tex]?

A. [tex]45xy - 220[/tex]
B. [tex]15x - 30y - 220[/tex]
C. [tex]15x + 30y - 220[/tex]
D. [tex]15x + 30y - 64[/tex]