Sea-floor spreading is a valuable theory as it relates to plate tectonics because
a. it replaced plate tectonics as the main theory explaining geologic processes.
b. it disproved the theory of continental drift by providing evidence that tectonic plates cannot move vast distances.
c. it was combined with the theory of continental drift to form one unified explanation.
d. it showed how the spreading of the ocean floor can cause earthquakes, which explained continental drift.

How do the authors differ in the way they present the war in "facing it" and "ambush"?

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.

What is one way that “the maori: genealogies and origins in new zealand” contrasts with “the raven and the first men: the beginnings of the haida”? a. the maori myth features courage, but the haida myth does not. b. the maori myth features community, but the haida myth does not. c. the maori myth features the gods, but the haida myth does not. d. the maori myth features deception, but the haida myth does not.