In asia, where palm trees are non-native, the trees’ flowers have traditionally been pollinated by hand, which has kept palm fruit productivity unnaturally low. when weevils known to be efficient pollinators of palm flowers were introduced into asia in 1980, palm fruit productivity increased—by up to 50 percent in some areas—but then decreased sharply in 1984.which of the following statements, if true, would best explain the 1984 decrease in productivity? (a) prices for palm fruit fell between 1980 and 1984 following the rise in production and a concurrent fall in demand.(b) imported trees are often more productive than native trees because the imported ones have left behind their pests and diseases in their native lands.(c) rapid increases in productivity tend to deplete trees of nutrients needed for the development of the 'fruit producing female flowers.(d) the weevil population in asia remained at approximately the same level between 1980 and 1984.(e) prior to 1980 another species of insect pollinated the asian palm trees, but not as efficiently as the species of weevil that was introduced in 1980.

c

Explanation:

Rapid increases in productivity tend to deplete trees of nutrients needed for the development of the 'fruit producing female flowers.

an expression designed to call something to mind without mentioning it explicitly; an indirect or passing reference.

given the fact that the question is about the detail that best support the idea that oppressive leaders use   propaganda to achieve thir goals,   the first option does not refer to any kind of propaganda, since it only tells about that the milk and the windfall apple should be reserved for the pigs. in the second option, that is, "snowball and napoleon sent out flights of pigeons whose instructions were to mingle with the animals on the neighbouring farms, tell them the story of the rebellion, and teach them the tune of "beasts of england". it can be identified that the oppressors make use of the propaganda, which is represented by the pigeons, and the information they have to tell other animals about what was happening in the farm in order to get their objectives. for that reason, the right answer is the second option, taking into account that the third option do not refer to propaganda since it only talks about that they did not want jones back. and, finally, the last option refers to the result of the given news, but it does not mean about the propaganda they used to achieve their goals.