Direction: ​In the question given below, a sentence is given, divided into parts. One of the parts may contain an error. Identify the part that contains the error, and mark it as the answer. Ignore errors of punctuation. In case the sentence is correct as it is, mark option (e), that is, 'No error'. The words in bold are grammatically and contextually correct.

Strictly speaking, the Silk Road was not a single highway but a network of roads that twisted and turned on the ways from east to west.