Each sentence below is divided into five parts (a), (b), (c), (d) and (e). Find the part that contains the error and give the answer accordingly. If there is no error, choose option (e) as your answer. Rarely financial institutions recognize (a) / the long-term risks associated with excessive lending (b) / until economic instability (c) / begins to expose structural weaknesses (d). / No error (e) 

Rule: When a sentence begins with negative adverbs, inversion is required. Common negative adverbs requiring inversion: Rarely Hardly Never Seldom Little Scarcely Structure: Negative adverb + auxiliary + subject + main verb Incorrect sentence: Rarely financial institutions recognize Correct structure: Rarely do financial institutions recognize Correct sentence: Rarely do financial institutions recognize the long-term risks associated with excessive lending until economic instability begins to expose structural weaknesses. Hence error lies in part (a).