Question

Spanish help. Anyone happen to know these?
1. Of the following verbs, which is a stem-changing verb? (1 point)

merendar
beber
estudiar
sacar

2.
We call these verbs stem-changing because (1 point)

they have stems, leaves and petals.
they have a spelling change in the first part of the verb in all forms.
they have a spelling change in the first part of the verb in all forms except nosotros and vosotros.

Answer 1

1. merendar 2,They have a spelling change in the first part of the verb in all forms except nosotros and vosotros..

Here's a reference as a follow up: http://www.rocketlanguages.com/spanish/resources/spanish_stem_changing_verbs.php

Answer 2

Thank you @charpede.