read the sentence. the peripheral nervous system—which is a network of nerves extending from your brain and…

read the sentence. the peripheral nervous system—which is a network of nerves extending from your brain and spinal cord to all parts of your body carries signals back and forth. which revision of the sentence is now properly punctuated? the peripheral nervous system—which is a network of nerves extending from your brain and spinal cord to all parts of your body carries signals back and forth. the peripheral nervous system (which is a network of nerves) extending from your brain and spinal cord to all parts of your body carries signals back and forth. the peripheral nervous system which is a network of nerves extending from your brain and spinal cord to all parts of your body carries signals back and forth. the peripheral nervous system—which is a network of nerves extending from your brain and spinal cord to all parts of your body—carries signals back and forth.

read the sentence. the peripheral nervous system—which is a network of nerves extending from your brain and spinal cord to all parts of your body carries signals back and forth. which revision of the sentence is now properly punctuated? the peripheral nervous system—which is a network of nerves extending from your brain and spinal cord to all parts of your body carries signals back and forth. the peripheral nervous system (which is a network of nerves) extending from your brain and spinal cord to all parts of your body carries signals back and forth. the peripheral nervous system which is a network of nerves extending from your brain and spinal cord to all parts of your body carries signals back and forth. the peripheral nervous system—which is a network of nerves extending from your brain and spinal cord to all parts of your body—carries signals back and forth.

Answer

Answer:

D. The peripheral nervous system—which is a network of nerves extending from your brain and spinal cord to all parts of your body—carries signals back and forth.

Brief Explanations:

The em - dash should enclose the non - essential clause to set it off properly. In option D, the em - dashes correctly separate the additional information about the peripheral nervous system from the main clause.