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.

Most of the carbon-trapping mechanisms / that we have identified are / based at limit studies.

A

No error

B

that we have identified are

C

based at limit studies

D

Most of the carbon-trapping mechanisms