the correct answer is c: the human genome project.
the human genome project was a scientific investigation that had as main aim to know the sequence of the components of the human dna. this is a magnificent resource for scientists and doctors as they use it regularly.
a temperature inversion is a thin layer of the atmosphere where the normal decrease in temperature with height switches to the temperature increasing with height. an inversion acts like a lid, keeping normal convective overturning of the atmosphere from penetrating through the inversion.
showing a photograph would make this a hell of alot easier