Choose the sentence that shows the CORRECT use of commas.
a. Just one week after, Yvette spent all weekend gardening new weeds were already appearing in her flowerbeds.
b. Just one week after Yvette spent all weekend gardening new weeds were already appearing in her flowerbeds.
c. Just one week after Yvette spent all weekend gardening, new weeds were already appearing in her flowerbeds.