The following sentence has been divided into parts. One of them may contain an error.
Select the part that contains the error from the given options. If you don’t find any error, mark ‘No error’ as your answer.
Frank has being making / the rounds, advancing a theory / that I believe is not without merit.

A

the rounds, advancing a theory

B

No error

C

Frank has being making

D

that I believe is not without merit