(a) Homo erectus appeared in Africa about 1.8 to 1.9 mya
(b) The brain size ranges from about 550cс to over 1200cc
(c) In 1960s, Louis Mary Leakey discovered a partial juvenile skull at Olduvai Gorge, Tanzania
(d) Some Homo 'erectus used Acheulean tools and others used Oldowan tools Choose the correct answer from the options given below: