a) he dislikes them because they are rude to him b) he likes them and feels like a boy again in their company c) he is indifferent to them because they are so young d) none of these ?
Near the end of Jim's story he relates to the reader of his visit to see Antonia. When he arrives he is introduced to all of her children. She makes dinner for him and they visit. She asks Jim to stay overnight and wait to meet her husband who will return soon. Jim agrees and sleeps in the hay-mowwith Leo and Ambrosch. It occurs to Jim that Leo
"seemed conscious of possessing a keener power of enjoyment than other people; his quick recognitions made him frantically impatient of deliberate judgements. He always knew what he wanted without thinking."(pg 187)
As Jim says good-bye, promising to return again for a visit, he is escorted to the gate by Ambrosch and Leo. On page 194 we can read about Jim's feelings for Ambrosch;
"I found I hated to leave this boy, with his plesant voice and his fine head and eyes. He looked very manly as he stood there without a ht. the wind rippling his shirt about his brown neck and shoulders."
http://www.enotes.com/my-antonia/q-and-a/what-jims-attitude-towards-leo-ambrosch-cusak-87693
