At a hill station the value of g is slightly less than its value at sea level. A student measures the same metal block first with a beam balance and then with a spring balance at the hill station. Which option correctly describes the readings compared to those at sea level?
a) Both readings are smaller
b) Beam balance reading unchanged; spring balance reading is unchanged
c) Beam balance reading unchanged; spring balance reading is smaller
d) Beam balance reading is smaller; spring balance reading unchanged