To conjugate -ir verbs, such as vivir, first you should _____.

add the verb endings -o, -es, -e, -imos, -ís, or -en to the stem then take out the stem viv.

add the verb endings -o, -es, -e, -imos, -ís, or -en to the entire word.

leave the stem vi, and then add the verb endings -vor, -ves, ve, -vimos, or -ven to the stem.

leave the stem viv, and then add the verb endings -o, -es, -e, -imos, -ís, or -en to the stem.