Final Answer:
The greatest number of bouquets Pat can make using all the flowers is 3 (Option A).
Step-by-step explanation:
Find the common factor of the number of each type of flower (roses, daisies, carnations):
Common factor of 12, 21, and 45 is 3.
Divide the quantity of each type of flower by the common factor:
Roses: 12 / 3 = 4
Daisies: 21 / 3 = 7
Carnations: 45 / 3 = 15
The smallest quotient obtained is the maximum number of identical bouquets:
The smallest quotient is 4, so the greatest number of bouquets is 4.
Thus, the greatest number of bouquets is 3 (Option A).