In the context of language models, what does it mean for them to be "unsupervised multitask learners"?
a. They learn from supervised data to perform a single, specific task.
b. They are trained on labeled datasets to predict future events in a single domain.
c. They learn from large amounts of unlabeled data and can perform various tasks without task-specific supervision.
d. They require explicit instructions for each task and are trained on small, labeled datasets.