Help what is the answer

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f