In “Superhero 101: A Family Secret,” Trace misses his grandmother's birthday party and visits her to apologize. How does this incident provoke Trace's grandmother to make a decision?

She's afraid to reveal how his grandfather really felt about him.

She doesn't want to have to tell him lies about his parents' deaths.

She doesn't want him to share his secret identity with his friends.

She tells him that she already knows about his superpowers.