Private goods generally are both remain excludable and rival during consumption by consumer. Option C is correct.
A private good is nothing but items that must be purchased in order to be used, and specifically used by one customer and inhibits use by another.
To put it another way, a good is deemed to be a private good if there is rivalry among people to obtain it and if using it prohibits someone else from using it.
Public goods, on the other hand, are accessible to everyone regardless of financial levels.
Therefore such private goods are excludable and rival in consumption in nature by default.
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