A data set consists of $6$ (not distinct) positive integers: $1,7,5,2,5$, and $X$. The average (arithmetic mean) of the 6 numbers equals a value in the data set. What is the sum of all positive values of $X$? (2022 AMC 10A Problems, Question \#8) 
选项为:A:$$10$$  B:$$26$$  C:$$32$$  D:$$36$$  E:$$40$$  请回答其中一个选项.