Which is a true statement?

A. The nucleus is found in the center of atoms and contain protons and electrons
B. The nucleus is found in the center of atoms and contains protons and neutrons
C. Electrons have a neutral charge
D. Neutrons have a negative charge

PLEASE HELP D:

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.