Some verbs have a spelling change from I to Y in the middle of the verb in the preterite tense because
Question 1 options:
the verbs have similar forms to ser and ir in the preterite tense.
it prevents having 3 vowels in a row when conjugating the verbs.
the verbs are regular verbs in the preterite tense.
those verbs end in -car, -gar, or -zar.