Which statement is indicative of a true parasite? 

A)  They may strengthen their hosts over a long period of time. 
B)  They rarely kill their hosts. 
C)  They are internal to their hosts. 
D)  They are usually larger than their hosts.

Parasite

An organism that lives in or on another organism (its host) and benefits at the host's expense.

Hosts

Organisms that provide nourishment or shelter to parasites or mutual symbionts, playing crucial roles in ecosystems and disease dynamics.

Internal

Relating to or situated on the inside of something; inner.