Measurements are taken and dimensions are established in a Living Room ( 20' wide, 30' long, ceiling height 8'). A thermometer on the room's thermostat displays a sensible temperature of 70 oF. Mean Radiant Temperature (MRT) is calculated to the Center of the Room with a resulting MRT of 64 oF. What would the Operative Temperature be in the room? Select one: a. 76oF b. 67oF c. More information is needed. d. 70oF e. 64oF