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they can consider to concuct a survey to all the g11 students in the philippines, however such a feet would be very laborious and so to say very difficult and impossible to pull off, so selecting places and picking student would be a better choice. Though is they are going with this they need to make sure that their representation is correct and the data they colleted isn't going to be bias, on sided or something along those lines to make sure that their research is a accurate as possible