In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?

A. t = 15 – 0.0065h
B. t = 15 + 0.0065h
C. t = 0.0035h -15
D. t = 15 – 0.0035h