The correct option is B b
The option that has an error, is the correct option.
Option B: The
error lies in part (b): 'where each one pursues their own golden bubble', where 'each' is the error.
'Each' refers to individual members of a group, and stresses on each person; it is used in for a group of two or more people.
'Every one' refers to all members of a group, and is used when the group contains two or more people'.
The given sentence refers to the entire world "this is a strange world", so 'every one' is the correct word.
The correction is 'where every one pursues their own golden bubble'.
Hence option B is the correct option with the error.
The other parts (a) and (c) do not have any error in them. They are grammatically correct and are complete in meaning.
Hence options A and C are not the right answers.
Option D is incorrect because the sentence has an error (b).