执行下面Python代码后，输出的结果是？（ ）
words = ["apple", "banana", "cherry"]
vowels = 'aeiou'
result = []
for word in words:
for char in word:
if char in vowels:
result.append(char)
print(result)
['a', 'e', 'a', 'e', 'e', 'e', 'a']
['a', 'a', 'a', 'e', 'e', 'e']
['a', 'e', 'a', 'a', 'a', 'e']
['a', 'e', 'i', 'o', 'u']