Please answer!! 10 points will be given, really need help!

This is from Chemistry.

The outer electrons in metal atoms differ from the outer electrons of nonmetal atoms in that the outer electrons of metals:

a) are loosely held
b) can conduct electricity
c) reflect many frequencies of light
d) all the above

It is D) all of the above

Here's why:
The outer electrons are farther away from the positively charged nucleus. The attraction they experience is therefore less. Less attraction means more "loosely held".
Electricity is just the flow of electrons. If the electrons are loosely held, it is easy to cause them to jump from atom to atom. this process is an electric current.
Technically electrons "reflect" light by absorbing photons (light) then emitting photons of the same frequency. Light is emitted when an electron loses energy and "falls" to a lower energy level close to the nucleus. Electrons that are farther away have more places where they can "fall" to. Depending on how much is the fall, the frequency of the emitted light changes. Thus more frequencies are possible.

b) can conduct electricity

It's D