During a thunderstorm benjamin franklin attempted to collect electricity from the air in a
key
kite
leyden jar
milk jar

The correct answer is C) Leyden jar.

During a thunderstorm, Benjamin Franklin attempted to collect electricity from a Leyden jar.

The Leyden jar was the first device that was able to capture and store an electric charge. It was invented by German scientist Ewald G. Von Kleist, on November 4, 1745.  

In 1752, when Benjamin Franklin was flying a kite. It was raining, indeed it was a thunderstorm. That is how he collected electrical charge in a Leyden jar.