2, and 3 only
9. Did you know that your pencil lead is made of graphite, a soft form of carbon?
Graphite is an excellent electrical conductor. Nevertheless, electrical wires are never made of
graphite; they are often made of copper instead.
Which of the following is the most likely reason for this?
A Graphite is not biodegradable, while copper is.
B Graphite is not available in every place, while copper is.
C Graphite is too heavy to be transported to different places.
D Graphite cannot be drawn into long wires, while copper can be
10 A boy and a girl are ple
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