Which of the following approaches based on a hash function H in creating a MAC on a message m with a secret key k is more secure$?$

Group of answer choices

H$($k$||$m$)$

H$($m$2||$k$||$m$1),$ where m$=$m$1||$m$2$

H$($m$||$k$)$

H$($m$1||$k$||$m$2),$ where m$=$m$1||$m$2$