What did the Third Circuit hold in Groff v$.$ Dejoy?

$($A$)$

Exempting Groff from Sunday work had imposed on his coworkers, disrupted the workplace, and diminished employee morale, therefore meeting the de minimis cost standard.

The de minimis cost standard is too trivial, and the employer must show something more than a de minimis cost.

The United States Postal service had discriminated against Groff based on religion.

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$$ It is unlawful for a federal employer to require an employee to work on a Sunday in order to make non$-$USPS deliveries $($such as deliveries for Amazon$).$