1. From the text, space elevators would make rockets unnecessary. Please see paragraphs 1 and 2. Hence the correct answer is A.
2. The detail from the text "Going up space elevator" that supports the first answer is D: People have always used rockets to escape the earth's gravity and its orbit.
How to answer a reading comprehension test
To answer a reading comprehension test properly, the first trick is to read the question. Then scan through the essay or story quickly. Then go back to the question.
It is usually easy to spot the answer this way.
See the link below for more about Reading Comprehension:
https://brainly.com/question/24711098