Toyota's VVT-I System Is Being Discussed

Multiple Choice

Toyota's VVT-i system is being discussed. Technician A says the VVT-i system controls valve overlap. Technician B says the VVT-i timing mechanism allows up to four distinct camshafts "settings". Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B