In the figure, proton moves a distance \( d \) in a uniform electric field \( E \) as shown in t...

In the figure, proton moves a distance \( d \) in a uniform electric field \( E \) as shown in the figure. Does the electric field do a positive or negative work on the proton? Does the electric potential energy of the proton increase or decrease?
(a) Negative, increase
(b) Positive, decrease
(c) Negative, decrease
(d) Positive, increase