Yes they should have been actively involved in Latin America
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Well which moves more? A solid is tightly packed, a liquid is looser, and gas is the loosest. So C is the answer. A rock will move and expand a lot less than a gas. Like blowing up a ballon, that is a lot of movement for the gas.
Repeating items over and over in order to aid memory is known as Maintenance rehearsal. Short term memory is able to hold information up to 20 seconds only.