A circuit loop contains an ideal battery of emf E and a resistor R in series. Starting at the negative terminal of the battery, a student traverses the loop through the resistor and returns to the positive terminal of the battery. Which of the following gives the correct algebraic signs of the potential differences across the battery and the resistor, respectively, as they should appear in the loop sum?
a) +E and −IR
b) −E and +IR
c) +E and +IR
d) −E and −IR