Sally, a student at Lincoln High School, gives the following speech to her city council.

"Thank you all for inviting me to speak today. Lincoln needs a soccer field. I hope you will all see the benefit of granting a permit to build one. Soccer is an important sport to the students at Lincoln. Soccer is the bomb. Thirty-five kids have said that they would sign up for a team if they had the chance. I am one of them. The money for regular upkeep has been raised. Please vote in favor of the permit. Thank you."

Which sentence contains slang?
A.
I am one of them.
B.
Please vote in favor of the permit.
C.
Soccer is the bomb.
D.
Lincoln needs a new soccer field.