Each of the following sentences has been divided into five parts (a), (b), (c), (d) and (e). One of these parts may contain a grammatical or contextual error. Identify the part that contains the error. If there is no error, choose option (e). There is growing evidence (a) / that several ancient civilisation (b)/ collapsed due to prolonged economic strain (c)/ rather than sudden military defeat (d). / No error (e)