Error Spotting - Subject Verb — Set 14

The group of scientists are investigating a new phenomenon.

Neither the first nor the second solution are satisfactory.

What is the measure of people who have successfully completed the training?

The organisation, including all its departments, are planning a major expansion.

Either my mother or my sisters is coming to the event.

There are hundreds of documents that needs to be processed.

The class have completed their final examinations.

Neither the author nor the publisher were concerned about the criticism.

Each article and review have been carefully edited.

The amount of work assigned to us are unreasonable.