<p>(Although the) coach had (predicted that) the team would have a winning season, the (fans were) surprised by the (success) of the young players.
No Error. </p>
<p>Normally and instinctively, I think it's no error, but then I chose "success". Why shouldn't it be successes instead of success? I thought that because young players is plural, success had to be plural as well? For a lot of the questions, plural nouns require plural nouns/objects, so what are the exceptions and how do you know if you should use plural or singular (such as success or successes)? Thanks!</p>