Task: Question Answering
Input (English): Problem: a plant manager must assign 12 new workers to one of five shifts. she needs a first, second, and third shift, and two alternate shifts. each of the shifts will receive 3 new workers. how many different ways can she assign the new workers ?
Options: a. 2430, b. 2640, c. 3300, d. 4860, e. 5400
Output (English): b