Which of the Following Statements Is (Are)true with Regard to the ISO

Which of the following statements is (are) true with regard to the ISO commercial crime coverage forms?
I.The discovery version only covers losses which occur during the policy period.
II.The loss-sustained version covers losses which occur during the policy period and the loss is discovered during the policy period or within one year after the policy expires.

A) I only
B) II only
C) both I and II
D) neither I nor II