The difference between private goods and common resources is that common resources are:
excludable, and private goods are nonexcludable.
nonexcludable, and private goods are excludable.
more valuable than private goods.
nonrival.
The correct distinction is that common resources are nonexcludable, and private goods are excludable.
To clarify:
Private goods are both excludable and rivalrous, meaning that individuals can be prevented from using them, and one person's use of the good reduces its availability for others.
Common resources are nonexcludable but rivalrous, meaning that individuals cannot be easily prevented from using them, but one person's use does diminish the availability for others.
So, the correct answer is: nonexcludable, and private goods are excludable.