Identifying main ideas in the pamphlet common sense, the author argues that the colonies should
a. establish a monarchy.
b. negotiate a peaceful settlement with britain.
c. break their ties with britain.
d. use war as a last resort.

The answer that would best complete the given statement above would be option C. In The Pamphlet Common Sense, the author argues that the colonies should BREAK THEIR TIES WITH BRITAIN. Hope this answers your question. Have a great day ahead!