What is the proper command to perform an Nmap XMAS scan every 15seconds?

What is the proper command to perform an Nmap XMAS scan every 15seconds?

Q. What is the proper command to perform an Nmap XMAS scan every 15seconds?

A.            nmap -sX -sneaky

B.            nmap -sX -paranoid

C.            nmap -sX -aggressive

D.            nmap -sX -polite

Answer: nmap -sX -sneaky

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