To find the solution set for the inequality 2 - 3x > 17, we can start by solving for x:
2 - 3x > 17
3x < 15
x < 5
So, the solution set for the inequality is all values of x that are less than 5.
Of the options given, only the set C, x = -9, -8, -7, -6, contains only numbers that are less than 5. Therefore, the set of numbers that contains only solutions to the inequality is C, x = -9, -8, -7, -6.