$48-$ An intruder committed an act by accessing your computer system without your permission. They are computer programmers with an advanced understanding of computers and commonly misuse this knowledge for devious reasons. They're usually technology buffs with expert$-$level skills in one software program or language. Find the missing word

a$-$SQL Injections

b$-$ Hacking

c$-$Idnetity theft

d$-$ Scammers