Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

Statements:

Jack drove faster than the speed limit.

People never follow speed limits at night.

The traffic police only catches over speeders during the day.

Conclusions:

I. Jack was driving at night.

II. The traffic police caught Jack.

III. If Jack was overspeeding at night, he must not have been caught by the traffic police.