隨意從$$1$$、$$2$$、$$3$$、$$4$$、$$5$$五數中選出$$2$$個不同的數相乘，試問乘積爲偶數的機率是多少？  Two different numbers are selected at random from ($$1$$,$$ 2$$, $$3$$,$$4$$,$$5$$) and multiplied together. What is the probability  that the product is even?
选项为:A:$$0.2$$  B:$$0.4$$  C:$$0.5$$  D:$$0.7$$  E:$$0.8$$  请回答其中一个选项.