Answer:
D. Using tools to measure radiation levels in space
Step-by-step explanation:
You want to identify the activity that is more likely to be the work of a research scientist rather than an engineer.
Engineering
The task of an engineer is to apply the laws of physics and the properties of materials to the creation of useful artifacts. Such artifacts may include space suits, fireproof materials, or food packaging.
Research
The task of a research scientist is to observe the world and the interaction of its parts. The purpose is to come to an understanding that allows prediction of future behavior.
Of the choices offered, the most likely task of a research scientist is ...
using tools to measure radiation levels in space.