Which expression is equivalent to the equation below after taking the first step to solve for x?

𝟏𝟐(𝟒𝒙+𝟏𝟎)=𝟔𝒙−𝟏𝟓

A. 12𝑥+10=6𝑥−15
B. 2𝑥+5=6𝑥−15
C. 8𝑥+20=6𝑥−15
D. 7𝑥=−9