Question

Scientists study systems that have different scales of size. Which is the

smallest system of the choices below?
A. study of sun and moon movements to predict tides
B. study of blood samples to learn about an unknown disease
C. study of exoplanets to examine the origins of the solar system
D. study of air and water conditions to find the causes of hurricanes

Answer 1

B. study of blood samples to learn about an unknown disease

Step-by-step explanation: