johnycute
In an effort to reduce the number of fires started by cigarettes, a major tobacco company is test-marketing a cigarette
in which thin layers of extra paper are used to decrease the amount of oxygen entering the cigarette, thereby slowing the rate at which it burns and lowering the heat it generates.
A. in which thin layers of extra paper are used to decrease the amount of oxygen entering the cigarette, thereby slowing
B. in which they use thin layers of extra paper in decreasing the amount of oxygen entering the cigarette, which slows
C. that uses thin layers of extra paper to decrease the amount of oxygen when it enters the cigarette, thereby slowing
D. for which thin layers of extra paper are used to decrease the amount of oxygen that enters the cigarette, and thereby slowing
E. using thin layers of extra paper in decreasing the amount of oxygen entering the cigarette, which slows
Option D is wrong because:
Whenever you see an
and after a
comma, check for two possibilities:
1- a list: apples, grapes, and berries
2- two main clauses
Since, in option d what follows
and is not a main clause. D is incorrect
PS: Following sentence is correct
Peter O'Toole was nominated for his first Oscar in 1962
, and his eighth in 2006, but he never actually won the award.
In this sentence- Peter (Subect/Noun), was nominated (verb), for (prepostion), Oscar (object/noun) have been dropped.
Remember: We can drop noun/pronoun, the verb, or even the preposition' for' after , and
but meaning should be clear