In operant conditioning, when should the reinforcer be presented in relation to the desired behavior?

Which quality ensures that you are in a better position to represent yourself

What was the main aim of the northwest ordinance of 1787

The sun a. will become a red giant within two to three million years b. is in its main sequence, which willlast thousands of years c. is in its main sequence, which will last billions of years. d. will explode as a supernova after its main sequence