Assertion: The matching principle requires that expenses be recognized in the same period as the revenue they help to generate.
Reasoning: The matching principle is an accounting principle that requires expenses to be recognized when they are incurred, regardless of when the cash is paid.

The Assertion is true because the matching principle requires that expenses be recognized in the same period as the revenue they help to generate. This is because expenses are incurred to generate revenue, and recognizing them in the same period helps to match the costs with the benefits. The Reasoning is false because the matching principle does not require that expenses be recognized when they are incurred, but rather when they are matched with the revenue they help to generate.