如何在第二帧上制作tkinter gui多项选择题？

import tkinter as tk

root = tk.Tk()
frame = tk.Frame(root)
frame.pack()

question = tk.Label(frame, text="这是一个多项选择题的题目")
question.pack()

option1 = tk.Radiobutton(frame, text="选项1", value=1)
option1.pack()

option2 = tk.Radiobutton(frame, text="选项2", value=2)
option2.pack()

option3 = tk.Radiobutton(frame, text="选项3", value=3)
option3.pack()

submit_button = tk.Button(frame, text="提交")
submit_button.pack()

def submit():
    selected_option = tk.IntVar.get()
    # 处理用户选择的选项
    # ...

submit_button.config(command=submit)

root.mainloop()