1. A system for automatically selecting question contents, the system comprising: an input section that receives as input: a question group having at least one question including an inquiry for testing knowledge about health and a plurality of answer options to the inquiry; an answer by a respondent to the question of the question group; a right answer setting for setting whether or not each of the options is a right answer; a right answer rate (RAR) threshold for the question group; a vital sign measurement value of the respondent; and a vital sign measurement value threshold; a storage section that stores: the question group; the right answer setting; the RAR threshold; and the vital sign measurement value threshold; a control section that selects the question group to assign to the respondent, based on: a RAR comparison result obtained by comparing a RAR of answers by the respondent, calculated from answers by the respondent inputted from the input section and the right answer setting stored in the storage section, and the RAR threshold for the question group which the respondent answers; and a vital sign measurement value comparison result obtained by comparing the measurement value of the respondent received as input in the input section and the measurement value threshold stored in the storage section; and a display section that displays: the inquiry and the options of the question of the question group which the control section assigns to the respondent; and the RAR comparison result and the measurement value comparison result.