I would think the answer would be C. Based off of what I've learned and heard. Sorry if it's not the correct answer though.
<span> The temperature of the water in both beakers is greater than 8 °C
This is because since the water passes on heat to the spheres, that means they are at a higher temperature then the spheres. if they were at a lower temp. The spheres would pass on heat to the water.
</span>
A replacement reaction which is where the positively charged portion of one of the reactants takes on the negatively charge portion of the other reactant without giving any portion of itself to the other to form products.
Cl2O but the two is a little two after Cl