From tree to supermarket shelf, itthe Menzas' coffee beans can change hands as many as 100 times, whilst the Menzas, like millions of other coffee growers, retain only a tiny share
of the price consumers pay for the crop

O a. has been estimated
O b. has estimated
O c. had estimated
O d. had been estimated​

From tree to supermarket shelf, it has been estimated the Menzas' coffee beans can change hands as many as 100 times, whilst the Menzas, like millions of other coffee growers, retain only a tiny share of the price consumers pay for the crop

during my first experiment, a kind of enthusiastic frenzy had blinded me to the horror of my employment . . my eyes were shut to the horror of my proceedings (230).

apex