Correct verb form

[Rustamsher]

Hello,Alan!

A new modern types of Ultra-books are assumed ... in expensive costs after holding demonstration.

a) to sell
b) to have been sold
c) to be sold
d) being sold

I saw the test above in a book. As concerns the answer, I have no exact option.
Could you help me?

P.S.: Is the article used at the beginning of the sentence correct?

Many thanks.

[Alan]

The sentence as it stands is highly ungrammatical and not fit for use in any test book! However, it would seem that (b) is the intended answer.

P.S. No - along with other parts, incorrect!