The poet laureate consultant, and the librarian of congress eagerly prepare for the new walt whitman exhibit.

how is the comma used incorrectly in the sentence above?

the comma attempts to separate a compound subject.
the comma attempts to separate a compound predicate.
the comma attempts to set apart an essential element.
the comma attempts to join two independent clauses.

The brother of a presidential candidate writes an editorial in which he defends this candidate against charges of corruption. in such a circumstance, it is most appropriate for the reader to a) suspect that the candidate may have been framed. b) consider whether the candidate has the best family or not. c) wonder if the writer may be biased, due to his family connection. d) wonder if the writer may be inaccurate, due to wanting to get people to read his column. \