The federal theatre project is a traveling exhibition, it may be coming to your city.
how is the comma used incorrectly in the sentence above?
a. the comma attempts to separate a compound predicate.
b. the comma attempts to join two independent clauses.
c. the comma attempts to set apart an essential element.
d. the comma attempts to separate a compound subject.

Which words in this excerpt from the count of monte cristo can be used as synonyms to determine the meaning of the word grotto? dant? s entered the second grotto. the second grotto was lower and more gloomy than the first; the air that could only enter by the newly formed opening had the mephitic smell dant? s was surprised not to find in the outer cavern. he waited in order to allow pure air to displace the foul atmosphere, and then went on. 1. air 2. opening 3. mephitic 4. cavern 5. pure 6. atmosphere