Answer:B
Explanation:
The number of different ways Carla and her friends can sit in the five seats can be calculated using the concept of permutations. Since there are 5 seats available and 5 people, each person can occupy one seat.
The number of ways to arrange the 5 people in the 5 seats can be calculated as 5 factorial (5!). The factorial of a number is the product of all positive integers less than or equal to that number.
5! = 5 * 4 * 3 * 2 * 1 = 120
Therefore, the correct answer is B. 120.