Benjamin Franklin flew a kite in 1752 in order to ______.

A．Kites were invented by imitating Chinese children's toy kites.
B．The kites terrified the enemy because they carried bombs
C．Different colors and painted patterns indicated different signals in ancient Chinese army.
D．Flying kites means flying bad luck away.

A．to run to work
B．to test the route in advance in person
C．not to make your feet wet on the way work
D．to walk as quickly as possible