Directions: Below a statement has been divided into four parts. The part in bold is fixed and contains no error. Among the other parts find the erroneous part. If there is no error mark option 5 as your answer.

Cities such as Dubai, which has pledged / to become the "happiest city in the world,"(A)/ dream up ever-more elaborate and intrusive ways of collection (B)/ data on well-being — to the point where their is now talk of(C)/ using CCTV cameras to monitor facial expressions in public spaces. (D)/ No error(E)