Ahas two (or more) loops through which current can flow.
parallel circuit
loop circuit
simple circuit
series circuit

A parallel circuit has two (or more) loops through which current can flow.

So, option A is your answer.

Hope this helps!

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom