Which statement is true about the graphs of the two lines y= -8x-5/4 and y= 1/8x+4/5?

a. the lines are perpendicular to each other because –8 and 1/8 are opposite reciprocals of each other.

b. the lines are perpendicular to each other because -5/4 and 4/5 are opposite reciprocals of each other.

c. the lines are neither parallel nor perpendicular to each other because –8 and 1/8 are not opposite reciprocals of each other.

d. the lines are neither parallel nor perpendicular to each other because -5/4 and 4/5 are not opposite reciprocals of each other.