June is correct because <span>12 is a </span>multiple<span> of both </span>3 and 4<span>.</span>
Here is a saying 5 and above give it a shove (round up) 4 and below go down low (round down). In your case you would leave it the same, because when rounding you would round to the nearest 10th.
Example:
54 would round down to 50 and 55 would be rounded up to 60.
I believe it should be (c)?