The question stem is in a cause and effect form. One thing to notice is that there is no reason provided for the cause.Due to wider commercial availability of audio recordings of authors reading their own books, sales of printed books have dropped significantly.
Notice there is no compulsion on the authors to do audio recordings; it is just stated as a matter of fact. C does just that.
(C)Because a new brand of soft drink entered the market , consumers reduced their consumption of an established brand
...
Notice there is no compulsion on the authors to do audio recordings; it is just stated as a matter of fact. C does just that.
(C)Because a new brand of soft drink entered the market , consumers reduced their consumption of an established brand
...
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