Question

read the sentence. the squirrel who ran in circles around the circumference of the tree chattered angrily at the curious cat. which correctly revises the sentence? the squirrel, who ran in circles around the circumference of the tree, chattered angrily at the curious cat. the squirrel who ran in circles around the circumference of the tree, chattered angrily at the curious cat. the squirrel, who ran in circles around the circumference of the tree chattered angrily at the curious cat. the squirrel who ran in circles around the circumference of the tree chattered angrily at the curious cat.

Explanation:

The relative clause "who ran in circles around the circumference of the tree" is non - restrictive (it gives extra information about the squirrel but is not essential to identify the squirrel). Non - restrictive clauses should be set off by commas. The first option correctly places commas before and after the non - restrictive clause. The second option has an incorrect comma after "tree" (if it were a restrictive clause, no commas would be needed, but it's non - restrictive). The third option has an incorrect comma placement (missing a comma after the non - restrictive clause). The fourth option has no commas for the non - restrictive clause.

Answer:

The squirrel, who ran in circles around the circumference of the tree, chattered angrily at the curious cat.