I think the answer is C but I also feel it should be A...... but I think its C
Using this equation, we can take 25/(1.0 + 19) and find that it is equal to 1.25 moles.
The redox reaction is

Here
Calcium undergoes reduction, and acts as cathode
Lithium undergoes oxidation and acts as anode
The reduction potential of calcium is -2.87 V
The reduction potential of lithium is - -3.05 V
We know that
Ecell = Ecathode - Eanode
Ecell = -2.87 - (-3.05) = 0.18 V
A. deposition
this means that it was moved from one place to another and can be transported by ice, water, gravity, or wind.
When it is acted upon by an outside force