One of the Major Distinctions Between Task Performance and Contextual

One of the major distinctions between task performance and contextual performance is that:

A) contextual performance is more likely to be formally instituted by the organization on a performance appraisal form.
B) contextual behaviors vary greatly across jobs, whereas task behaviors are similar across jobs.
C) contextual performance is not relevant to employees outside the United States.
D) task activities have different antecedents than do contextual performance.