Consider a time span of 15 year or more from stocks, bonds, bills: Please answer the following questions (T F)

a: Stocks beat bonds over the span of any 15 year or more. T F

b: The risk is higher and material for stocks. T F

c: The risk you should not be concerned with in case you invest in stocks for 15 year or more. T F

Please post your response as it has far reaching implication for your future 401K