Humans Are Biological Organisms

Humans are biological organisms. To understand our behavior and mental processes, we need to understand their biological underpinnings, starting with the cellular level, the neuron. How we feel, learn, remember, and think all stem from neuronal activity. So, how a neuron works and how neurons communicate are crucial pieces of information in solving the puzzle of human behavior and mental processing. Richard Griggs, Psychology: A Concise Introduction

A) Argument; conclusion: To understand our behavior ... the neuron.
B) Argument; conclusion: Humans are biological organisms.
C) Argument; conclusion: How we feel ... neuronal activity.
D) Argument; conclusion: How a neuron works ... mental processing.
E) Nonargument.