The correct order to form a meaningful sentence is BACED. Part B comes first as it introduces the subject of the sentence, which is the farmers. It states that farmers are eligible for something. Part A specifies what the eligibility is related to (accordingly, BA forms a necessary pair). It specifies that farmers are eligible for government support. Part C introduces the conditions required to acquire government support. Parts E and D further explain the condition in detail. Hence, (d) is the correct answer.
The complete sentence is: Farmers are eligible for government support if they let a certain amount of land lie fallow.