The "Think Imaginary Academy" is trying to collect opinions to improve the school lunch program, which of the following information should not be collected via samples? 
选项为:A:students\textquotesingle{} allergy situation  B:students\textquotesingle{} food preference  C:students\textquotesingle{} health demand  D:students\textquotesingle{} cultural background  请回答其中一个选项.