【单选题】Which of theunderline expressions isthe hedging of the following sentences.There is experimental work to show that a week or ten days may not be long enough and a fortnight to three weeks is probably ...
A.
There is experimental work to show that a week or ten days may not be long enough and a fortnight to three weeks is probably the best theoretical period.
B.
There is experimental work to show that a week or ten days may not be long enough and a fortnight to three weeks is probably the best theoretical period.
C.
There is experimental work to show that a week or ten days may not be long enough and a fortnight to three weeks is probably the best theoretical period.
D.
There is experimental work to show that a week or ten days may not be long enough and a fortnight to three weeks is probably the best theoretical period .