Which sentence has an unnecessary comma? Our little black mutt, Cassie, suddenly became ill with pneumonia.
The dog's little legs, began to swell up and become difficult to move
Most people associate pneumonia with humans, but animals can catch it
too
D)
After a week of lying in her little bed, our dog began to feel a bit better,

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

cutt.ly/XzW3SUN

the unnecessary commas are:

The dog's little legs, began to swell up and become difficult to move, and

After a week of lying in her little bed, our dog began to feel a bit better,

Explanation:

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.  

answer; the sons of liberty;