During the last couple of years, the most frequently asked question I have heard at prophecy conferences, relates to salvation in the Tribulation. It goes something like this: “If a lost person hears, understands and rejects the Gospel before the Tribulation, would he or she be able to be saved during the Tribulation?” Some think the answer is “No,” while others think it is “Yes.” I believe that people will have the possibility to be saved in the Tribulation regardless of how much they have been exposed to the Gospel before the Rapture.
Ice, Thomas D., "Salvation in the Tribulation: Revisited" (2009). Article Archives. 99.