Which list of observations is the best evidence of only a chemical change occurring? A. new odor, smoke released, color change
B. new shape, drying out, texture change
C. new temperature, shorter length, state change
D. new volume, stretched out, color change

It is d, all the other ones say incorrect answer .

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

Iwould think it would be 2.6