单选题   阅读下面短文，掌握其大意，然后从以下各题所给的A、B、C和D项中，选出最佳选项。
    Happy memories are pleasant; sad memories are painful. So what helps us remember the good moments and     51    the bad ones? The answer is a mixture of personality, gender(性别) and the     52    someone uses to make sense of their feelings.
    Once in a survey, scientists invited seventy-one     53    , 38 women and 33 men, to fill out a questionnaire. From their answers to the     54    , scientists were able to work out their personalities and more than 100 memories of each person. From analyses of differences between personality and     55    , they found that people who were out-going and confident were more likely to     56    pleasant experiences than bad ones. People who were sensitive, greedy and selfish tended to     57    think about bad memories. Both men and women with these     58    also recalled more bad memories.
    However, the way men and women try to deal with bad memories is quite     59    . For men, to remain optimistic so as to think about a bad memory     60    can lead to recall more pleasant memories, but suppressing(抑制) the bad memories brings neither     61    memories nor bad ones. For women,     62    the bad memories usually brings an even lower mood than before, which means that women are more likely to suffer from depression than men. Those     63    people, as it is mentioned before, usually women, recollect unpleasant memories and     64    they feel sad.
    Scientists suggest the best ways to deal with bad memories are to be     65    , never stay in a bad mood for too long and try to think about our memories from a positive angle.