Someone that nows spanish ?

when is the letter i accented in the conjugated verb enviar (present tense)?

a.
always, except in the nosotros and vosotros forms

b.
only in the nosotros and vosotros forms

c.
always, except in the yo and nosotros forms

d.
only in the infinitive form of the verb

Beber should be in the blank

3. study 4.eat 5.play american football 6.write a card 7.practice piano 8.swim in the pool 9.paint a mural 10.listen to the band 11.dance at a party 12.drink milk 13.visit panama 14.open the card 15.prepare dinner 16.stay in the house 17.watch tv 18.write on the paper 19.study spanish 20.examine the paintings in the museum. i hope this : )

La noche