Which type of Nmap scan is the most reliable, but also the most visible, and likely to be picked up by and IDS?

Which type of Nmap scan is the most reliable, but also the most visible, and likely to be picked up by and IDS?

A.
SYN scan

B.
ACK scan

C.
RST scan

D.
Connect scan

E.
FIN scan

Explanation:
The TCP full connect (-sT) scan is the most reliable.