On a two-way road, on which side of a traffic island must you drive?

On a two-way road, on which side of a traffic island must you drive?
A)On its right.Correct
B)On its left.
C)On its right or its left, indistinctly.
When there are refuges, islands or guide devices on the road, you must drive on the part of the carriageway that is to the right of these, in the direction of travel, except when they are located on a one-way road or within the part corresponding to a single direction of traffic, in which case you may drive on either side.