The slope of a sensitivity graph of -5 with respect to operating costs means A) a 1% increase in operating costs leads to a 5% decrease in PW of the project. B) a 1% increase in operating costs leads to a $5 decrease in PW of the project. C) a $1 increase in operating costs leads to a 5% decrease in PW of the project. D) a $1 increase in operating costs leads to a $5 decrease in PW of the project. E) a 1% increase in operating costs leads to a 5% increase in PW of the project. Explain please