Practice figuring out whether we took a random sample and whether we're able to draw valid conclusions from our data.

Problem

Tasty Treats Baking Company asked all students in the senior class at Ridgemont High School the question, “Do you prefer chocolate or butterscotch Tasty Treats?” Everyone surveyed had to pick one of the two answers, and 42, percent said they preferred chocolate.
Based on this data, which of the following conclusions are valid?
Please choose from one of the following options.