Sentence Correction

A vault was so securely constructed and reinforced in she san francisco bank that even a magnitude seven earthquake did not disturb the vault's contents.

a. same
b. so securely was a vault construction and reinforcement in the sanfrancisco bank
c. it was so secure that a vault was constructed and reinforced in the sanfrancisco bank
d. a vault that was so securely constructed and reinforced in the sanfrancisco bank
e. constructed and reinforced so securely in th esan francsco bank was a vault that

QA is A but I chose E. where did i go wrong?