Amphetamine, Methamphetamine, Caffiene, Ephedrine, Nicotine, Cocaine, <span>Methylenedioxymethamphetamine (MDMA or Ecstasy)</span>
e. decision making because a means that you have not reached a conclusion, be is more of "i only have so much" type of answer, c does not make sense, and definitely not d.
The immune system fights off the pathogen by Leukocytes also known as white blood cells. When a pathogen enters the body the immune system becomes alert to it and sends out sends out the Phagocytes (a type of Leukocytes) which engulfs the pathogens.
i think its D....cuz they all make sense to me