The statement that is correct about the relation between the velocity and thermal boundary layers for flow over a flat plate is a. if the velocity boundary layer is turbulent, so is the thermal boundary layer. b. if the velocity boundary layer is turbulent, then the thermal boundary layer is much thinner than the velocity boundary layer. c. there can be a thermal boundary layer without a velocity boundary layer if the flow is laminar. d. the velocity boundary layer grows with distance along the plate, but the thermal boundary layer is constant with distance.