What is in the red plastic cans Grandpa finds on the yacht?

• A. Gasoline
• B. Water
• C. Oil
• D. Soda

Answer: (A)

The main idea is recognizing color-coded safety containers and what their color signals about contents, especially on a boat. Red plastic cans on a vessel are a strong clue that they hold a flammable fuel used for the engine. Gasoline is routinely stored in red cans to flag its flammability and to keep it separate from other liquids. That makes sense on a yacht because you need ready access to fuel for running the engine, yet you want to avoid confusing it with water, oil, or beverages.

Water would typically be kept in containers that look inert or clear, since it isn’t hazardous. Oil can be stored in various containers, but engine oil isn’t usually placed in bright red fuel cans meant for gasoline. Soda or other beverages appear in packaging designed for drinking, not rugged fuel containers. So the red cans most consistently align with gasoline, given the safe-transport color-coding conventions and the fuel needs of the boat.