For example, unmanned space probes can gather information more easily than a human can.
Closer to home, many biochemical research and pharmaceutical industries use pipetting robots for their repetitive pipetting chores.
C is wrong. Machines can do things faster than any human ever could and not get tired, but humans possess the intelligence, expertise, and skills to use the robots most efficiently and to solve problems when things go wrong.
It is important to collect all data first, or else your guesses could purely be the opposite of the right answer. If you make inferences of what might happen, your guesses may be purely fictional, and totally off-topic. During experiments, this step is important.