选择题
2023 AMC 8 Problem 21: Dividing Cards into Groups
Alina writes the numbers 1, 2, …, 9 on separate cards, one number per card. She wishes to divide the cards into 3 groups of 3 cards so that the sum of the numbers in each group will be the same. In how many ways can this be done?
2023 AMC 8 第 21 题：将卡片分组
阿丽娜将数字 1、2、…、9 写在不同的卡片上，每张卡片一个数字。她希望将卡片分成 3 组，每组 3 张卡片，以便每组中的数字之和相同。有多少种方法可以做到这一点
A.
0
B.
1
C.
2
D.
3
E.
4