To predict the number of times a slushie or an ice cream sundae prize ticket will be drawn, we need to add the number of slushie prize tickets and the number of ice cream sundae prize tickets.
There are 8 slushie prize tickets and 4 ice cream sundae prize tickets.
Adding them together gives us 8 + 4 = 12.
Therefore, a reasonable prediction for the number of times a slushie or an ice cream sundae prize ticket will be drawn is 12.
Therefore, the correct answer is not listed among the given options.