Schweser Practice Exam #1/Question 2 (AM)

Question 2-B ask for Time Horizon of Short-Term Portfolio My answer was short, 90-days or less (equivalent to the 90-day high grade corporate commerical notes). How did Schweser get Time Horizon of 30 days to 1 year. Is this typical of short portfolio for Insurance companies? Am I missing something? Anyone else confused? Thanks, Kleine