<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be that "iron rails were easily replaceable", since in fact that represented relatively permanent infrastructure. </span></span>
"(3) It became a site of strategic competition <span>between the superpowers" would be the best option as to what the Middle East meant during the Cold War. </span>
The key invention that led to computers becoming smaller and more common in American households in the 1980s was the keyboard.
<h3>What is an Invention?</h3>
This refers to the creation of a thing that has not been in use before to make life easier and faster or to improve on something already available.
Hence, we can see that with the invention of the keyboard, there was the reduction in computer size in American households in the 1980s as the keyboard was a separate entity.
Read more about inventions here:
brainly.com/question/17931211
