For the following statements: (1) The average lifetime of a debt security's stream of payments is called duration (11) The duration of a portfolio is the weighted average of the durations of the individual securities, with the weights reflecting the proportion of the portfolio invested in each. (III) Duration can be used to measure the expected change in price of stock to a change in the interest rates. (1) is true, (II) false, (III) true. (l) is false, (II) true, (III) true. O (1) is true. (11) true, (III) false. All are true. O None are true