An electron is carried from the positive terminal to the negative terminal of a 9V Battery. (Physics)

Not sure if its D or E. please explain the difference. my guess is its D because Joules is only for work? thanks in advance.

An electron is carried from the positive terminal to the negative terminal of a 9V Battery. How much work is required in carrying this electron?
A) 1.6 x 10^-19J
B) 17 x 10^-19J
C) 9J
D) 14.4 x 10^-19J
E) 14.4 x 10^-19 J/C

the work required is W = e V = 1.6x10^-19 x9 J = 14.4 x10^-19 J. so the answer should be (D)

jnr is correct. But to answer your question, your guess is correct because work (which means energy transferred) has units of joules.

J/C is another name for a volt (V) which is related to work (energy) but is not the same.