Which of the sectors below $-\mathrm{A}, \mathrm{B}, \mathrm{C}$or $\mathrm{D}-$ should fill the empty sector in the circle?

 

$\mathrm{AB}$ Delete the last character

$\mathrm{BC}$ Replace the third character with the next in the alphabet

$\mathrm{CD}$ Insert the letter P between the third and fourth characters

$\mathrm{DE}$ Exchange the first and last characters

$\mathrm{EF}$ Replace the second character with the previous letter in the alphabet

$\mathrm{FG}$ Replace the fifth character with the next in the alphabet

$\mathrm{GH}$ Reverse the whole sequence of letters

$\mathrm{HI}$ Delete the third character

MOZLUCK$=\mathrm{AB}+\mathrm{FG}+\mathrm{CD}=?$