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What is the correct way to write these two sentences?
The brain stem connects your brain to your spinal cord. Which connects to most of the nerves in your body.
a. The brain stem connects your brain to your spinal cord, this connects to most of the nerves in your body.
b. Connecting your brain to your spinal cord and then to most of the nerves in your body.
c. Connecting your brain to your spinal cord. It connects to most of the nerves in your body.
d. The brain stem connects your brain to your spinal cord, which connects to most of the nerves in your body.
d. The brain stem connects your brain to your spinal cord, which connects to most of the nerves in your body.