Victoria Has a Huge Phobia of Spiders

Multiple Choice

Victoria has a huge phobia of spiders. Victoria is currently dating Joshua who owns a pet tarantula. Victoria refuses to even be in the same room as Joshua's tarantula. Joshua is trying to help Victoria overcome her fear of his tarantula.
-Victoria gets annoyed because Joshua keeps talking to her about her fear of spiders and confronts him about his fear of clowns.According to the principles of classical conditioning which situation might most likely have caused Joshua's fear of clowns

A) His parents hired a clown for his 10th birthday, but none of his friends attended the party.
B) His parents hired a clown for his 5th birthday and Joshua got sick from hot dogs and cake.
C) He once dressed up as a clown for Halloween and everyone made fun of him.
D) He was bullied by Chris in elementary school and Chris now works as a professional clown.