Which of the following has the smallest mass? Convert them all the grams first. O A. 4.0 x 10-6 g
O B. 4.0 x 109 ng
O C.4.0 x 10-2 micrograms
O D.4.0 x 10-3 kg
O E. 4.0 x 10-6 mg

i think it's c. i'm not sure but i think so.

the correct answer is:

a. formation of precipitation

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.