Based on the rules for regular verbs in the past simple, analyze these three sentences.

I - She danced gracefully at the party last night.

II - Wendy studyed a lot for the presentation.

III - They talked about their plans for the future.

Which of the following sentences is/are correct?

a.
II, only

b.
I and III, only

c.
I, II and III

d.
I and II, only

e.
II and III, only