Maximum speed for any vehicle in Louisiana is 70 mph except:
a) When pulling or towing another motor vehicle, the speed limit is (1).
b) School buses are limited to (2) when frequently stopping to load or unload children.
c) Where (3) is posted.
d) On portions of I-49, the speed limit is (4)

a) 60 mph, 55 mph, 75 mph, 65 mph
b) 65 mph, 45 mph, 70 mph, 55 mph
c) 55 mph, 35 mph, 65 mph, 60 mph
d) 50 mph, 40 mph, 60 mph, 50 mph