When will a dominant trait show its effect in the presence of one dominant gene.
This goes to say that a dominant trait will show its effect even when individual only has one copy of the allele.
It's A and D. Those are the only two that make since and those are the only right ones. The other ones don't even exist...
IF the amount of NaCl stays the same, and you are only adding NaClO3 then the answer is A