312-49v10 question 489 discussion

Question 489

During an investigation of an XSS attack, the investigator comes across the term [a-zA-Z0-9\%]+ in
analyzed evidence details. What is the expression used for?
A. Checks for upper and lower-case alphanumeric string inside the tag, or its hex representation
B. Checks for forward slash used in HTML closing tags, its hex or double-encoded hex equivalent
C. Checks for opening angle bracket, its hex or double-encoded hex equivalent
D. Checks for closing angle bracket, hex or double-encoded hex equivalent