Which type of Cross-Sire Scripting (XSS> vulnerability is hardest for automated testing tools to detect, and for what reason?
A. Stored XSS. because it may be located anywhere within static or dynamic sitecontent
B. Stored XSS. because it depends on emails and instant messaging systems.
C. Reflected XSS. because It can only be found by analyzing web server responses.
D. Reflected XSS: because it is difficult to find within large web server logs.