One of the Differences Between Simple Partial Seizures and Complex

One of the differences between simple partial seizures and complex partial seizures is that:

A) simple partial seizures stem from changes in the activity of the neurons, whereas complex partial seizures originate from external factors such as allergens.
B) simple partial seizures are accompanied by some characteristic movement, whereas complex partial seizures often involve staring into space.
C) simple partial seizures cause loss of memory, whereas complex partial seizures do not impair memory.
D) simple partial seizures do not cause loss of consciousness, whereas complex partial seizures often impair consciousness for a minute or two.