what instrument would scientist use to take measurements in the upper troposphere

Ax-ray monitor

Bice core bore

Cweather balloon

Dunderwater sonar

Verified Answer :

Scientists use the instrument weather balloon to take measurements in the upper troposphere. Answer: C.
The weather balloon uses small device called radiosonde and measures weather parameters like atmospheric pressure, temperature, humidity and wind speed.
These instruments operate in the troposphere.

Scientist use a weather balloon to measurements in the upper troposphere.