Based on the description of Sergei's past, readers can conclude that — F his experiences in Russia made him fearful and paranoid G his experiences as an immigrant in Israel made him fearful and paranoid H his experiences as a Holocaust survivor made him fearful and paranoid J his experiences living among Arabs made him fearful and paranoid

This question is about “What, of this Goldfish, Would You Wish?”

his experiences in Russia made him fearful and paranoid  

Explanation:

Sergei's father was a Zionist when his family lived in Russia. This meant that Sergei's house was visited by strangers all the time. These strangers asked so many questions and appeared so often that it left Sergei traumatized, he was somewhat paranoid and afraid of strangers asking him questions. This greatly influenced the way he attended Yoni.

- "he is a very real person and his intent isn't to influence us vonnegut addresses this towards the end of the letter when he says, if we choose to curse, that is by our own individual means."