B is the best answer.
It uses verb tenses correctly to indicate that construction of the buildings was completed prior to the earthquake.
A and C illogically state that some buildings were both destroyed and damaged; or is needed to indicate that each of the buildings suffered either one fate or the other. In using only verb tense, were, A fails to indicate that the buildings were constructed before the earthquake occurred.
C and D use the present perfect tense incorrectly, saying in effect that the buildings have been constructed after they were destroyed last year.
E suggests that the construction of the buildings, rather than the earthquake, occurred last year, thus making the sequence of events unclear.
"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"