As Natalie, Who Has Extremely Long Nails, Approaches the Chalkboard

question 2

Multiple Choice

As Natalie, who has extremely long nails, approaches the chalkboard, many of her classmates cover their ears. What represents the conditioned stimulus?

• A) Natalie approaching the board
• B) Natalie scraping her nails on the board
• C) covering one's ears when Natalie scrapes the board
• D) covering one's ears as Natalie approaches the board

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