The reason for the correct answer
Hi dear Amoz
In agreement with love-to-learn, I have to say that item 3 best fits the sentence. Because after the word technologywhich is a noun we can continue the sentence in two ways:
using a realative clause(here a that clause) or an infinitive.
Items 2 & 5 are out of discussion as after thatwe can't use a gerund and the word imprintsin item 5 starts with no subordinator.
Item 1 can't correct as in that case the sentence after thatwould lack a main verb.
And item 4 is not correct because after that in a relative clause we can't use a pronoun.
So we have item 4 left.