Answer:
A & C
Explanation:
It is A & C!
It is A because:
You said it yourself in the last paragraph of your question:
"An area that includes 9 smaller rectangles and is the intersection of 3 of the 12 columns and 3 of the 6 rows is shaded."
A is fits the perfect description for what you said in the last paragraph.
It is C because:
C is the other answer because it's an equivalent fraction to A.
1/4 x 3/3 = 3/12
1/2 = 3/6
Hope this helps, rose <3