Read the following story excerpt: 'Elara stared at the ancient map, her heart pounding with a mix of excitement and trepidation. The legend spoke of a hidden artifact deep within the Whispering Caves, guarded by trials only the bravest could face. She knew the journey would be perilous, but a deep longing for adventure propelled her forward.' Which of the following keywords would best help to continue the story, focusing on the discovery of a crucial clue?
A) courage
B) mystery
C) inscription
D) shadow
E) echo