Tech A says that variable valve timing allows the engine to operate more efficiently and with more power over a larger range than with a standard fixed valve timing engine. Tech B says that the use of variable valve timing (VVT) enables some manufacturers to eliminate exhaust gas recirculation (EGR) valves. Who is correct?
a) Only Tech A
b) Only Tech B
c) Both Tech A and Tech B
d) Neither Tech A nor Tech B