Leaky found the skull of a 1.4 million year old human and believed this was the first human to have made tools since he found tools near by. leaky also discovered a 20 million year old human skull and believed this to be the first sign of humans on earth
The executive branch of the government is involved when the Department of Justice charges a company with being a monopoly. The US Department of Justice has a different function from the judicial branch of the government. The judicial branch interprets the laws and judges the accused, while DOJ investigates and litigates cases.
B seems like the best choice.