Task: Question Answering
Input (English): Recent research on hominid species dating from the Middle Pliocene indicates there was (as of 2020):
(A)a great amount of species diversity, or a single species that exhibited a lot of diversity. (B)very little species diversity during this period and very few hominids. (C)decreased species diversity due to a prolonged ice age followed by a severe drought. (D)decreased species diversity but increased numbers of hammerstones and flakes, indicating stone tool manufacture.
Output (English): A