Which states of matter would you commonly see in your home?
a. solid, liquid, plasma
c. gas, solid, plasma
b. liquid, plasma, gas
d. solid, liquid, gas

The best answer would be (d.) solid, liquid and gas. These states of matter that you would commonly have at home must be visible and present, for gas it may be invisible but it is mostly present to anywhere. However, if there are neon lights at your home, it would also be possible to have plasma in there.

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