I need to get a new bike. Because the one I have now isn't working very well.
Which of the following would be a better way to write the above sentences?
A.
I need to get a new bike, because the one I have now isn't working very well.
B.
Because I need a new bike, the one I have isn't working very well.
C.
The one I have now isn't working very well because I need a new bike,
D.
I need to get a new bike because the one I have now isn't working very well.