1.000.000 is the correct answer
Late answer:
Chromosphere.
I believe the answer is C because the first two are mechanical hazards and C mentions plug which is electrical.
Answer:
Accuracy of a measured value refers to how close a measurement is to the correct value. The uncertainty in a measurement is an estimate of the amount by which the measurement result may differ from this value. Precision of measured values refers to how close the agreement is between repeated measurements.
Explanation: