The answer says that only options 2 and 4 are right and option 0 is impossible.
But here is my solution which proves that option 0 is possible:
Let’s A=0, B=2, C=0, D=2;
So their sum is 0+2+0+2=4 (which is an even number)
And their product is 0*2*0*2 = 0 (which is also an even number)
So why choice 0 is incorrect?
Here is what the book tells me about it:
“Since these four integers have an even product, at least one of them must be even, so roman numeral I, 0, is impossible” . But I don't understand why