The answer is B. The linking verb is 'is'. Linking verbs do not show any action but they connect the subject of a sentence to a word that gives information about that subject.
The part of the sentence that tells "who" or "what" the sentence is about is the subject.
C. You need a comma when the sentence changes subjects from humans to bottlenose dolphins.
This is where Lennie has gone back to that place by the river after he has killed Curley’s wife. Lennie expects that George will give him hell. he asks George if George is not going to do it. George says that he will not, but Lennie really wants him to.
