Словообразование упражнение №8

Read the texts below and decide what part of speech in A, B, C or D best fits each gap in the sentences.
Cereals are various species of the grass family, (1) _______ for their seed, which is used as food. The name is (2) _______ from Ceres, the Roman goddess of grains and agriculture. Although the cereals do not belong to any (3) _______ tribe of the grasses, the use of particular species as bread plants seems to have been determined chiefly by the (4) _______ size of the seed or by the (5) _______ of obtaining it in (6) _______ quantity and of freeing it from its (7) _______ covering. The most (8) _______ cultivated grains are wheat, barley, rye, oats, rice, corn or maize. These have all been cultivated since ancient times. Maize is the only grain that (9) _______ in America; the others were developed in Europe, Asia, and Africa.

1. cultivation cultivable cultivated cultivar	2. derived derivative derivation deriving	3. particularly particularity particularized particular	4. superiority superior superiorly super	5. easy easily ease easement
6. suffice sufficient sufficiency sufficiently	7. edible edibly eat edibility	8. extensively extensive extent extensible	9. origin original origination originated