pleaeeee helpppppppp

What makes a stem changing verb different than a regular -ar, -ir, or -er verb? *

the endings
there are 2 changes
none of the above
both of the above

In the verb DORMIR, what is the stem change? *

o to o
o to a
o to ue
o to i

Which of the following subjects does not receive a stem change? *
nosotros
ellos
yo
tú

What is the stem change for the verb PODER *
pod-
pid-
pied-
pued-

What is the stem change for the verb JUGAR? *
jueg-
jug-
jog-
joeg-