The correct option is C Flax fibres - Linum usitatissimum
Linum usitatissimum, is a member of the genus Linum in the family Linaceae. It is a food and fiber crop that is grown in cooler regions of the world. The textiles made from flax are known in the West as linen, and traditionally used for bed sheets, underclothes and table linen. The oil is known as linseed oil.