Final answer:
The mode of the number of spots on a flower in the given set is 5, as it appears most frequently in the list.
Step-by-step explanation:
The mode of a set of data is the number that appears most frequently. To find the mode, we need to count how many times each number appears in the set. Looking at the provided data set:
- 3 appears 1 time
- 5 appears 4 times
- 8 appears 3 times
- 10 appears 1 time
- 12 appears 2 times
Since the number 5 appears the most frequently (4 times), it is the mode. So, the answer to the question 'what was the mode of the number of spots on a flower?' is B. 5.