The earliest members of the genus Homo a. had a larger brain compared to other hominins. b. probably hunted dinosaurs. c. lived about 4 million years ago. d. were the first hominins to be bipedal.

Verified step by step guidance

1. Identify the characteristics of the earliest members of the genus Homo by reviewing the evolutionary history of hominins.
2. Understand that the genus Homo is distinguished from other hominins primarily by brain size, tool use, and other anatomical differences.
3. Recognize that dinosaurs became extinct about 65 million years ago, long before any hominins, including members of the genus Homo, appeared.
4. Recall that the first bipedal hominins appeared earlier than the genus Homo, with species such as Australopithecus being bipedal.
5. Determine the approximate time period when the earliest members of the genus Homo lived, which is generally accepted to be around 2.5 million years ago, not 4 million years.