All of the following sentences are complex except

a) even though acid rain can have damaging effects, few people know much about it.
b) acid rain has been studied as an environmental issue by the government since the 1970s.
c) since they erode statues and corrode steel structures, the chemicals in acid rain are harmful.
d) since the industrial revolution began, emissions of sulfur dioxide and nitrogen oxide have increased.

Aproblem associated with drinking a beverage while driving is a.you may swallow more than intended b.your hands will be greasy c.your judgment will be impaired

Which two elements does this excerpt from a christmas carol by charles dickens contain? "a small matter," said the ghost, “to make these silly folks so full of gratitude." "small! " echoed scrooge. the spirit signed to him to listen to the two apprentices, who were pouring out their hearts in praise of fezziwig: and when he had done so, said, "why! is it not? he has spent but a few pounds of your mortal money: three or four perhaps. is that so much that he deserves this praise? " "it isn’t that," said scrooge, heated by the remark, and speaking unconsciously like his former, not his latter, self. "it isn't that, spirit. he has the power to render us happy or unhappy; to make our service light or burdensome; a pleasure or a toil. say that his power lies in words and looks; in things so slight and insignificant that it is impossible to add and count ’em up: what then? the happiness he gives, is quite as great as if it cost a fortune." he felt the spirit's glance, and stopped. "what is the matter? " asked the ghost. "nothing particular," said scrooge. "something, i think? " the ghost insisted. "no," said scrooge, "no. i should like to be able to say a word or two to my clerk just now. that's all."

For the word below, click on the drop-down arrows to select the root and its meaning. version