Identify SQL injection attack from the HTTP requests shown below:

A.
http://www.myserver.c0m/search.asp?
lname=smith%27%3bupdate%20usertable%20set%20passwd%3d%27hAx0r%27%3b–%00

B.
http://www.myserver.c0m/script.php?mydata=%3cscript%20src=%22

C.
http%3a%2f%2fwww.yourserver.c0m%2fbadscript.js%22%3e%3c%2fscript%3e