In spanish why are the present-tense verbs for yo complete considered to be stem-changing verbs?

1.Because in some of them, when the e is stressed, it is changed to ie

2.Because in some of them, when the o is stressed, it is changed to we

3. Because in some of them, when the e is stressed it is changed to I

4. Because in some situations, the first person singular is irregular(My answer)

1 answer

It's number 3 , just took the quiz !