C for me as well. For a number to be divisible by 6, it needs to be divisible by both 2 and 3. A number is divisible by 2 if its units digit is even, and divisible by 3 if the sum of its digits is divisible by 3.
From stat 1, we need to know what the last unit is. For example, if its 0, then the number will be divisible by 2 and 3 ... if its 1, for example, it wont be. Insuff.
From stat 2, we know that since the unit is 6, the number is even and therefore divisible by 2. But we dont know anything about the first two. Insuff.
Together, we know that the sum of the digits is divisible by 12 (6+6), and that its also divisible by 2 since the units digit is 6.