The lowest temperature ever recorded at Oymyakon in Russia was 96.2°F below 0°F. The lowest temperature ever recorded at Prospect Creek in Alaska was 80°F below 0°F

"-96.2° F" is the right answer.

Step-by-step explanation:

Whereas if average temperature x°F underneath 0°F then perhaps the attempting to read thermometer seems to be -x°F. Because at Oymyakon throughout Russia the minimum temperature seems to have been 96.2°F underneath 0°F  And the measurement of something like the thermometer during Oymyakon at either the lowest reported temperature has been -96.2°F.

So that the above is the correct answer.