One
A: q/s charge per second sounds like a current. It is not the answer.
B: Joule/coulomb is energy / charge that is the definition of EMF That is your answer.
C: Joule / second sounds like a watt. That's not the answer.
D: Newton / m^2 is a pressure. Not your answer.
Two
The resistance of a wire or any cylinder is
R = k * L/Cross Sectional Area
k is a constant
L is the length
The Cross sectional area is pi*r^2 where r is the radius.
If the length is doubled and so is the radius
Everything cancels out except r1/r = 2/4 = 1/2
So the resistance is 1/2 of what it was.
E = I * R
E is a constant.
R = R/2
E = I * R/2
2 * (E / R) = I
(2*I) = the new I
The answer is A