PROBLEM TO BE SOLVED: To send a request to respondents for answers by taking into account media that makes the respondents feel easy to answer.;SOLUTION: An answer control server 1 comprises: a storage device 10 for storing respondent data 13 associating respondent identifiers of answer terminals 4 with results which respondents have answered to each of notices of a plurality of media; answer request registering means 21 for receiving answer requests from an answer request terminal 3; notifying means 22 for, for such an answer terminal 4 that has not sent answers to the answer requests from the answer request terminal 3, determining media to notify the answer terminal 4 of an answer request by referring to the respondent data 13, and notifying the answer terminal 4 of the answer request via the sever of the determined media; and answer receiving means 23 for, when receiving an answer from the answer terminal 4, updating the respondent data 13.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2019,JPO&INPIT
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