Which of the following assigns a dictionary list of keys and values to the variable named persons?

a$)$ persons "Sam":"CEO", "Julie":"President"$\}$

b$)$ persons Sam", "CEO"$],["$Julie$",$ "President"$]\}$

C$)$ persons $=("$Sam$"$:"CEO", "Julie":"President"$)$

d$)$ persons $=["$Sam$"$:"CEO", "Julie":"President"$]$