Answer :
The number of options Cristina can choose will be 24.
It is given that
Total brands of cars =3
Number of models = 2 (either a 2 door or 4 doors)
Number of colors available = 4
What is permutation?
A permutation is a mathematical calculation of the number of ways a particular set can be arranged.
Let us say Cristina choose a single brand,
The number of ways she can choose a single brand will be choosing a single brand having two or four doors means two possibilities. again each possibility can have 4 colors means two possibilities will be having a total of 4*2 options ie 8 options.
So, the total number of options she can choose will be the 3*8 ie 24 options.
Therefore, The number of options Cristina can choose will be 24.
To get more about permutation visit:
https://brainly.com/question/1216161