【单选题】When the calculated duration of the project network plan is greater than the required duration, the basic method to optimize the construction duration to meet the required duration is ( ).
【单选题】Which one of the following is a correct statement concerning duration?
A.
The higher the yield to maturity, the greater the duration
B.
The higher the coupon, the shorter the duration.
C.
The difference in duration can be large between two bonds with different coupons each maturing in more than 15 years.
D.
The duration is the same as term to maturity only in the case of zero-coupon bonds.
E.
The higher the coupon, the shorter the duration; the difference in duration can be large between two bonds with different coupons each maturing in more than 15 years; and the duration is the same as term to maturity only in the case of zero-coupon bonds