Question

Which of these scientific and technological advances occurred mainly in the twenty-first century? Select two correct answers.(2 points) Responses [Choice A] the Internet [Choice A] the Internet [Choice B] smartphones [Choice B] smartphones [Choice C] Mars Rover [Choice C] Mars Rover [Choice D] social media [Choice D] social media [Choice E] automobiles

Answer 1

The two correct answers that occurred mainly in the twenty-first century are:

• Choice B: smartphones
• Choice D: social media

While the Internet is a foundational technology that began in the late 20th century, smartphones and social media platforms became widely popular and developed significantly in the twenty-first century. The Mars Rover missions have taken place in both the twentieth and twenty-first centuries, and automobiles have been around since the late 19th century.