Answer:
A. in parallel.
Step-by-step explanation:
In the series circuit, the current is the same for all of the elements in the circuit. This means that current in a resistor is the same as in every other resistor
Mathematically,
I =
=
= ... =

In the parallel circuit, the total current is the sum of the currents through the individual components
Mathematically,
=
+
+ ... +

For the series circuit, connecting six 1 A cells yields
I =
=
=
=
=
=
= 1 A
For the parallel circuit, connecting six 1 A cells yields
=
+
+
+
+
+
= (1 + 1 + 1 + 1 + 1 +1) A
= 6 A
It therefore follows that the answer is option A. in parallel.