Which is NOT an advantage of a series circuit?

a
They are simple and are less likely to overheat.
b
They are circuits so that if one section of the circuit fails, the whole circuit fails.
c
They are able to have additional power sources easily added to them.
d
They do not require a complicated pattern of wires to create.

c

They are able to have additional power sources easily added to them.

b

They are circuits so that if one section of the circuit fails, the whole circuit fails.

If your light bulbs were wired in series, lose one, lose all ! (used to be a problem with series wired Christmas lights)

Correct! Another disadvantage of a series circuit is that if one component fails, it can cause the whole circuit to fail. Thanks for the clarification!