What did Alex's dad tell his mom was dumping poop in the ocean and should be stopped?

• A. Cruise ships
• B. Fishing boats
• C. Submarines
• D. Oil tankers

Answer: (A)

The main idea here is recognizing which type of vessel is most commonly linked to discharging wastewater into the ocean. Cruise ships carry thousands of passengers and crew, producing substantial amounts of sewage and graywater. That combination makes them the most plausible source people would point to when saying waste is being dumped at sea and should be stopped. The other options don’t fit as naturally: fishing boats are smaller and not typically spotlighted for sewage dumping, submarines aren’t usually discussed in this context, and oil tankers are associated with oil pollution rather than human waste. So cruise ships are the most reasonable answer.