1) The piece of furniture was purchased nearly ten years ago. Which of the following is correct?

1) The piece of furniture was purchased nearly ten years ago.

Which of the following is correct?

a) There is one auxiliary and one main verb in this sentence.

b) This sentence is in the past perfect tense.

c) This is a sentence in the present tense.

d) There are two main verbs in this sentence.

e) The main verb in this sentence is a past tense form.