'What's Gussie been doing?'
‘Gussie is making a perfect idiot of himself.'
"To one who knew young Gussie as well as I did, the words opened up a wide field for speculation."
The remarks in these lines serve mainly to what?
1) suggest that Gussie is known for foolish behavior.
2) emphasize the narrator’s desire to help Aunt Agatha.
3) cast doubt on Aunt Agatha’s reason for visiting the narrator.
4) imply that the narrator is unconcerned with Gussie’s well-being.