Complete the sentence with the best relative pronoun. University of North Carolina scientists study the effects of ageing argue that a combination of genetic and environmental factors control the speed of the ageing process in humans.

University of North Carolina scientists who study the effects of ageing argue that a combination of genetic and environmental factors control the speed of the ageing process in humans.

Explanation:

The best relative pronoun to use in the sentence above is who. This pronoun is used to refer to people. In this case, it refers to "scientists". "Who" is also used when it is the subject of the relative clause, which is the case here - "who" is the subject of "study the effects of ageing". "Whom" would be inadequate because it cannot be the subject, and "which" refers to objects, animals, ideas and so on, but not to people. We can use "that" as well but, since the sentence seems to be a bit more formal, "who" is the best choice.

the answer to this question is c.

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)