D. if I increases, R must decrease
Step-by-step explanation
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.it says
the triangle states the 3 formulas:
![\begin{gathered} V=I*R \\ I=(V)/(R) \\ R=(V)/(I) \end{gathered}](https://img.qammunity.org/2023/formulas/physics/college/t8u0p6fxz35712mseij92iz5nqizewa0kp.png)
so
Step 1
if we let V constant
![\begin{gathered} V=R*I \\ constant(k)=R*I \end{gathered}](https://img.qammunity.org/2023/formulas/physics/college/38s4iwx2vxds7i69imk0mpmlaf7y9p3nbg.png)
now, as the product of R and I must be constant:
if you increase the resistance, the current must decrease, or if yuo increase the current, the resistance must decrease to maintain the same voltage ( constant)
therefore, the correct answer is
D. if I increases, R must decrease
I hope this helps you