Las Vegas Casino Guide How Did Las Vegas Casinos Increase Security After 9/11? (Multiple Choice Question)?

How did Las Vegas Casinos increase security after 9/11? (Multiple choice question)? - las vegas casino guide

Hey, it's part of my study guides and examination can not find the answer .... The answer, of course, if you send a reply!

a.) Has surveillance cameras in the area outside the casino.
b) allow the security personnel of the casino with a concealed weapon.
c) establish technology to scan the retina go to the casinos
d) use the software for fingerprint recognition to all users to enter a casino

Thank you!