Long-term memory may involve

a. an influx of potassium ions into the neuron.
b. activating substance P.
c. a change in the shape of the neuron's cytoskeleton.
d. forming a nerve plexus.
e. rearranging neurons in the brain.

Explanation:

Long-term memory may involve  a change in the shape of the neuron's cytoskeleton.

The long-term memory process involves a structural change with the growth of new synaptic connections by the sensory neurons onto their follower cells.

Option E.

Rearranging neurons in the brain.

Explanation:

Long term memory is the ability to keep and remember information for later use. It is the ability to recall what happened more that few minutes ago when it happened. It can last for days or few years.

A person with long term memory will be able to remember information over time.

Long term memory involve the physical change in structure of the neurons or nerve cell in the brain