Accede is a synonym of acquiesce.
Acquiesce is a synonym of accede.
As verbs the difference between acquiesce and accede is that acquiesce is to rest satisfied, or apparently satisfied, or to rest without opposition and discontent (usually implying previous opposition or discontent); to accept or consent by silence or by omitting to object; — followed by "in", sometimes also by "with" and "to" while accede is (archaic|intransitive) to approach; to arrive, to come forward.
Answer:
C) as if there had been some magic power in the vigorousness
as if there had been some magic power in the vigorousnessof his speech
B. The negative names, such as Ignorance and Flatterer, remind the reader that there are more different types of evil than of good in this world.