Which one of following types of investment has the highest risk and the highest potential rate of return

(d) due to the earlier malfunction, the aviation mechanic double-checked the wires.< this one is correct hope this  

Amy is analyzing a job offer. amy’s salary analysis annual salary benefits average monthly rent average monthly utility costs $48,500 401k matched up to $2,500/year, $5,000 in bonuses $1,100 $200 how much should she expect to pay on rent and utilities each year?   solution: average monthly rent = 1100/year = 12(1100) = 13200average monthly utilities = 200/year = 12(200) = 2400so,13200 + 2400 = 15600  thus, the correct answer is:   d.$15,600