Answer:
Step-by-step explanation:
The mode is the most number of times a number appears in a set of data points.
If there is at least one entry in the data set, then there is at least 1 mode. You can have more than 1 mode.
3, 3, 3, 5, 6, 6, 6 has 2 modes. (3 and 6)
3 has 1 mode.
[ ] set has no modes because this is the empty set.
Conclusion
A is not true. See the example above
B is true. It can have more than 1 mode
C is true for everything but the empty set.
D is simply false.
I think you are intended to pick C, but B is also true. I can't give you just 1 answer. It is a faulty question.
