Answer:
I belive a, c, and d.
Step-by-step explanation:
the proportionality is 1/4. these are the only letters that are like that. basically for a, 1×4=4 so that's correct. for c, 3×4=12 so thats correct, and d, 5×4=20 so that's correct. the other answers dont work, so only these are the correct answers.
A, C, D
C
Using the rule of radicals/ exponents
⇔
Given
= → C