The answer is C
Because you have to add them all up. So add the 1/3 and 2/3 which equals 3/3 which is equal to 1. So then you add the 1/6 which equals 2/6 which is equivalent to 1/3 then you add that 1/3 to the last 1/3 which also equals 2/6 and as we established that equals 1/3 so the answer is 1 and 1/3.