The true statement is only Adam followed the law of supply.
The supply schedule is a table that aggregates the quantity supplied by the suppliers a good at different quantities.
The law of supply states that when prices increase, the quantity supplied increases and when price falls, the quantity supplied falls. This shows that price and quantity supplied are positively related. This is the reason why the supply curve is positively sloped.
It is only Adam's quantity supplied that increases when price increases. Thus, it is only Adam that is following the law of supply.
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