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:
so
Step 1
if we let V constant
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