What is the purpose of a comma?
Give three examples of how to use a comma

Which would be the most credible source for researching the effects of smoking? letter from your grandfather web page about someone’s lung cancer report prepared by a tobacco company research article in a scientific journal

What was the biggest type of pirate ship called?

What is the best way to manage oil transport on waterways? a. prevent oil spills and regulate the amount of oil that can be shipped at one time. b. use a skimmer, containment boom or chemical dispersant to clean up spilled oil. c. burn off oil spills from the water's surface when they occur.