2. What is the dewpoint temperature if the dry-bulb is 16°C and the
wet-bulb depression is 5°C?

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

c. is the correct answer

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .