Which of the following is a property of a true solution?

I uploaded the answer to a file hosting. Here's link:

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since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

i'm assuming that it's c.) red bank..