If integers ending in zero are excluded, what is the unit digit of the product of the even integers from 302 to 398, inclusive?  Select the correct option.
A) 2
B) 4
C) 6
D) 8
E) 10
302 x 304 x 306 x 308 =&gt; unit digit 4   312 x 314 x 316 x 318 =&gt; unit digit 4   392 x 394 x 396 x 398 =&gt; unit digit 4   So we have 10 numbers ending by 4 to multiply.   Given that 4 x 4 = 16, we have 5 numbers ending by 6 to multiply   Given that 6 x 6 = 36, we have 3 numbers ending by 6 to multiply   So the unit digit is 6   Answer: 6
<result>C</result>
If integers ending in zero are excluded, what is the unit digit of the product of the even integers from 302 to 398, inclusive?