Harper had always been a curious child, wanting to know how things operated and what made them run. While watching her father install new light fixtures, she marveled at the intricacies of how electricity worked. She asked her father multiple questions to satisfy her curiosity. Harper's mother had warned her husband against answering every question as it would slow the installation process. "You're opening Pandora's box," she said.

Explanation:

Allusions are indirect references to a place, thing, person or an idea with an unrelated context. It is used as a figure of speech. For example, "He seems worse than Brutus", "Your garden looks like the Garden of Eden", "I met a Good Samaritan", "Such a Herculean task!".

Here, since Harper was a curious a child, her mother has made an allusion to Pandora's box because Pandora, according to the myth, was a curious girl. She had endless curiosity to what was inside the box.

the answer is   b suffix addition