Choice A reason:

This is a correct answer, as bladder control is regulated by nerves that originate from the sacral region of the spinal cord, which is below T6.

Choice B reason:

This is an incorrect answer, as respiratory rate is regulated by nerves that originate from the cervical and thoracic regions of the spinal cord, which are above T6.

Choice C reason:

This is a correct answer, as heart rate is regulated by nerves that originate from the thoracic and lumbar regions of the spinal cord, which are below T6.

Choice D reason:

This is an incorrect answer, as arm movement is regulated by nerves that originate from the cervical region of the spinal cord, which is above T6.

Choice E reason:

This is a correct answer, as leg movement is regulated by nerves that originate from the lumbar and sacral regions of the spinal cord, which are below T6.