The people on the expedition had to eat Sticks and stones so that they can survive in that difficult weather.
I believe the correct answer is D
Answer:
<em>b. an Operational Definition</em>
Explanation:
An <em>operational definition is the expression of conceptual model (or procedural statement) used to define the terms of a method required to determine the essence of an objec</em>t or an occurrence and its characteristics including period, volume, spatial expansion, chemical properties.