Here's a problem to solve: Which of these do scientists offer as the most recent explanation as to why many plants and animals died out at the end of the Mesozoic era?

Among the 4 following options, which is the correct answer?

- A: worldwide disease
 
- B: global mountain building
 
- C: rise of mammals that preyed upon plants and animals
 
- D: impact of an asteroid created dust that blocked the sunlight
 