Answer:
D. 192
Explanation:
192 possible combinations.

Think of it this way. If you can choose a shirt and pants with colors blue and green for each, You combinations would be blue blue, green green, blue green, and green blue. 2 options and 2 options.

Another example with ice cream, flavor and topping.
Choose 1 option from each category.
Flavors: Vanilla, Chocolate, Strawberry
Toppings: Caramel, Sprinkles, M&Ms
All Combinations:
Vanilla, Caramel
Vanilla, Sprinkles
Vanilla, M&Ms
Chocolate (with the three toppings)
Strawberry (with the three toppings)
9 total combinations,

Multiply the number of options for each category.