Two cars ran ________ each other this morning.

• A. Into
• B. Onto
• C. Through
• D. Past

Answer: (A)

The main idea is using the phrasal verb run into to describe a collision. When two things meet by accident, we often say they ran into each other. Here, two cars collide, so ran into each other is the natural choice, with into showing contact and impact.

Other prepositions don’t fit because they describe different ideas: onto would be moving onto a surface, not crashing; through suggests passing completely through something; past means moving by without making contact. So this sentence correctly conveys a crash between the two cars.