Three of the following statements are comma splices. Choose the one correctly punctuated statement that is not a comma splice.

a ) Cyber bullying has been increasing over the last few decades, many states are responding by creating laws against it.

b ) Cyber bullying has been increasing over the last few decades, consequently many states are responding by creating laws against it.

c.) Cyber bullying has been increasing over the last few decades, and many states are responding by creating laws against it.

d ) Cyber bullying has been increasing over the last few decades, therefore many states are responding by creating laws against it.