If k is a non-negative integer and 15^k is a divisor of 823,435 then 5^k - k^5 =  Choose the most appropriate option:
A) 0  B) 1  C) 35  D) 120  E) 245
8+2+3+4+3+5= 
<gadget id="calculator">8+2+3+4+3+5</gadget>
<output>25</output>
25, so this number is not divisible by 3 and thus not divisible by 15.   Therefore, k=0   5^k - k^5 =1-0= 
<gadget id="calculator">1-0</gadget>
<output>1</output>
1   The answer is 1.
<result>B</result>
If k is a non-negative integer and 15^k is a divisor of 823,435 then 5^k - k^5 =