computer science hello would like some help so i can see how i missed this question thanks

Incorrect Question 7 0/1 pts Which of the following bash functions can exploit the shellshock vulnerability if the new bash process is triggered and the environment variables pass to it? f0o2='echo "malicious codes": 0 ( echo "Hello world" fool='0 (echo "Hello world": 1; echo "malicious codes": foo3=0 (echo "Hello world"; }; echo "malicious codes": foo4-echo "malicious codes": 0(echo "Hello world")