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.

Read the passage: canines may not be the deepest thinkers in the world. but perhaps that's for the best. the life of a dog—sitting alone all day, waiting for everyone to come home—can be pretty boring. super-smart animals would probably get totally stressed out, says university of pennsylvania researcher james serpell. look at it this way: if dogs were any smarter, they probably wouldn't choose to hang around with us. which best describes the tone of the passage?

In 250-300 words, discuss jem’s character development in to kill a mockingbird. how does he grow and change? what are the major events that affect that change?

How can you paraphrase this, this is about golden age fallacies.these are all rational people who know that older is not necessarily better, but many are taken in by this fallacy and seem no longer able to reason with any degree of reliability