• Aa hydrogen addition process
• a carbon rejection process
• Can exothermic process
• Da coking process

Catalytic cracking breaks large hydrocarbon molecules into smaller, more hydrogen-rich fragments (like gasoline), rejecting the excess carbon as coke deposited on the catalyst — hence it's classified as a carbon-rejection process (as opposed to hydrocracking, which is a hydrogen-addition process). It is also endothermic overall, not exothermic.