In the past few years,my heart will go on was a popular song among young peo

In the past few years,My Heart Will Go On was a popular song among young people,______were often heard singing it at parties.

A、who B、which C、they D、that
我知道选A，但我觉得选C也行，不当非限制性定语从句也讲得通。烦请帮忙解释一下。

不当非限制性定语从句时确实选C也是正确的。但是在这个句子里面用非限制性定语从句我觉得可能你你那个稍微好一点点，

无所谓了，语言嘛，很灵活的~

你好！ 从句的主语应该是 my heart will go on 如果选C，需要连词连接两个句子。 如果对你有帮助，望采纳。