which of these scientific and technological advances occurred mainly in the twenty - first century? select…
which of these scientific and technological advances occurred mainly in the twenty - first century? select two correct answers. (1 point) the internet smartphones mars rover social media automobiles
Answer
Brief Explanations:
The Internet has its origins in the 20th - century (ARPANET in 1960s). Smartphones became widely - used and advanced in the 21st century. The Mars Rover missions like Spirit and Opportunity launched in 2004 and Curiosity in 2012 are 21st - century feats. Social media platforms such as Facebook (founded in 2004) and Twitter (founded in 2006) became prominent in the 21st century. Automobiles date back to the late 19th century.
Answer:
B. smartphones C. Mars Rover D. social media