A car dealership has 12 sports cars, 6 sport utility vehicles, and 7 luxury cars on its lot. How many outcomes are there for randomly choosing a vehicle?

a. 3
b. 6
c. 12
d. 25

There are a total of 12 sports cars, 6 sport utility vehicles, and 7 luxury cars, making a total of 12 + 6 + 7 = <<12+6+7=25>>25 vehicles.

Therefore, there are 25 possible outcomes for randomly choosing a vehicle.
The answer is d. 25.