Linda Is Studying the Interaction Between Porcupines, Pinion Pine Trees

Linda is studying the interaction between porcupines, pinion pine trees, and pine bark beetles. Over the course of her study in northern Texas, she observes the behaviors of 25 porcupines, records the location of 151 pinion pines, and traps 332 beetles. Her study encompasses ________ populations) and ________ organisms.

A) 1; 508
B) 3; 3
C) 508; 508
D) 3; 508
E) 508; 3