Which line from “cruel tribute” best supports the idea that ariadne’s actions advance the plot?

After researching, the correct answer for the question that is being presented above is this one: "Then she gave him a sharp sword, and hid it underneath his cloak, telling him that with it alone could he hope to slay the Minotaur." The line from “Cruel Tribute” that best supports the idea that Ariadne’s actions help advance the plot is 'Then she gave him a sharp sword, and hid it underneath his cloak, telling him that with it alone could he hope to slay the Minotaur.'

Then she gave him a sharp sword, and hid it underneath his cloak, telling him that with it alone could he hope to slay the Minotaur.