The answer to your question would be A; it has more electrons than protons
When trying to identify negatively or positively charged objects, you have to think about the charges of the sub-atomic particles, in this case the protons, electrons and neutrons.
Electrons= negative overall charge
Protons= positive overall charge
Neutrons=neutral overall charge
therefore, if an object is negatively charged, it has to have more electrons than any other sub-atomic particle and hence the answer is A.