If 123xy is divisible by 40, then the value in place of x+y is :  Choose the correct choice from the following answers:
A) 1  B) 7  C) 4  D) 3  E) 9
123xy     1 + 0= 
<gadget id="calculator">  1 + 0</gadget>
<output>1</output>
1/4 ≠ 40   7 + 0= 70/4 ≠ 40   4 + 0 = 40/4= 
<gadget id="calculator">40/4</gadget>
<output>10</output>
10   Answer: 4
<result>C</result>
If 123xy is divisible by 40, then the value in place of x+y is :