“Whether you have morning sickness, motion sickness, or nausea from chemotherapy or radiation therapy, help may be no farther than your refrigerator or kitchen pantry. There are several foods that can help the body mitigate mild to moderate nausea. Pectin is a dietary fiber that occurs naturally in plant cell walls. Fruits such as apples, peaches, plums, and currents are good sources of pectin, as are carrots and potatoes. Ginger, also known as ginger root, is another very powerful plant that works on the digestive tract. Ginger is found in ginger ale, gingersnaps, gingerbread, and certain Chinese dishes. So the next time your stomach is feeling queasy, try reaching for a can of ginger ale, or nibbling a gingersnap cookie, an apple, or a carrot.”

the correct answer is option d. none of these. it is noted that options a, b, and c share the same content.

despite the valid answer provided at the last sentence of each of the options, a question/answer format shouldn't include humourous themed responses such as "you bet your thermal pj's we do." - unless of course, the answer is carried out in an informal environment. this could be replaced with a simple "yes" or "it is necessary".

the question should be re-phrased to a more appropiate syntaxis. instead of "do we need the greenhouse effect? ", it should be written as "is the greenhouse effect necessary? " in order to give it a general scope, instead of limiting the answer to the needs of "we" the humans.

"the tune the he might never know again." this part build anticipation. dexter got extremely happy by the piano tune. he could see what he was living at that moment in his life throught this feeling. the reader might want to learn more about his happy life. in fact, he called it a state of   'ecstasy'. the fact that he had got in a mood of intense appreciation and that everything about him was extremely bright and glamorous might lead the reader to feel that this state of happiness may not last long. the two parts from the excerpt that exemplify the anticipation are: " the sound of the "; " it was a know again."