How should this sentence be changed? i think we should do something about the overgrown playground on third street it presents a danger to the community.

1.    I think we should do something about the overgrown playground on Thrid Street. It presents a danger to the community.

or

2.    I think we should do something about the overgrown playground on Third Street because it presents a danger to the community.

on the first on i add a period between street and it

on the second on i added because between street and it

i think it's the second one that is what i would put

i'm not sure i'm so sorry i will see what i can do

i think the answer is either c or d

im thinking d might make more sense though

sorry if im wrong