Which of the following is not true about Operation X-Ray?
a. It involved the use of bats and incendiary devices to help destroy structures throughout Japan
b. It was the leading project to help the US invade Japan until the atomic bomb program took the lead
c. Operation X-Ray failed to be used because it didn't work - no tests yielded positive results
d. Operation X-Ray resulted in the development of a new incendiary substance, napalm
e. all of these are untrue
