Consider a uniform electric field in the \(z\text-\)direction. The potential is constant:
a. in all space
b. for any \(x\) for a given \(z\)
c. for any \(y\) for a given \(z\)
d. on the \(x\text-y\) plane for a given \(z\)
 
1. (a), (b), (c) 2. (a), (c), (d)
3. (b), (c), (d) 4. (c), (d)