D)For the new telecom operators, the connection fee does not form an insignificant proportion of their revenues.
I answered D because "the connection fee does not form an insignificant proportion of their revenues" means the connection fee is a significant proportion of new telecom operators' revenue. If the fee does not important revenue to them, they cannot improve their financials by increasing the fee.
(the passage : Since the connection fee is one of the sources of revenue for
...
I answered D because "the connection fee does not form an insignificant proportion of their revenues" means the connection fee is a significant proportion of new telecom operators' revenue. If the fee does not important revenue to them, they cannot improve their financials by increasing the fee.
(the passage : Since the connection fee is one of the sources of revenue for
...


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