In the castle when the clock struck every hour The music got louder.
In some historical contexts or in fictional representations such as fairy tales or stories, it's a common trope or narrative device for something significant to happen when the clock strikes every hour in a castle.
The choice B, "The music got louder," suggests that when the clock struck every hour, there was a noticeable change in the intensity or volume of the music within the castle. This scenario might be part of a story or legend depicting a magical or whimsical setting, where the chiming of the clock triggers an event