The author refutes the opposing opinion introduced in this excerpt by — Answer choices for the above question

A. showing how inexpensive human exploration is.

B. giving examples of how food can be grown on the moon or Mars.

C. pointing out that humans haven’t found a safe location in space yet.

D. detailing the advantages of using satellites to track weather systems from space.

Which lines from the speech best supports this topic sentence? and as we walk, we must make the pledge that we shall always march ahead. we cannot turn back. there are those who are asking the devotees of civil rights, "when will you be satisfied? " and they have come to realize that their freedom is inextricably bound to our freedom. we cannot walk alone. we refuse to believe that there are insufficient funds in the great vaults of opportunity of this nation. and so we've come to cash this check, a check that will give us upon demand the riches of freedom and the security of justice. and so let freedom ring from the prodigious hilltops of new hampshire. let freedom ring from the mighty mountains of new york. let freedom ring from the heightening alleghenies of pennsylvania.

Which work would represent a change to the artistic medium of this original work?

Answer this correctly what is the cause and effect