The correct answer is Silk is known for its luxurious smoothness, and this is attributed to the long fibers it possesses. The length of the fibers in silk contributes to the fabric's soft and silky texture, making it distinct from materials like cotton and wool, which have shorter fibers. B "Silk has much longer fibers than either cotton or wool."
Silk's luxurious smoothness stems from its remarkably long fibers, a distinctive feature setting it apart from cotton and wool. These extended fibers contribute to the fabric's soft and silky texture, creating a tactile experience that feels exceptionally smooth to the touch. Unlike cotton and wool, which have shorter fibers, silk's length imparts a unique quality, making it a sought-after material for items like couches.
Ahmed can assure his client that the inherent characteristics of silk, particularly its long fibers, are responsible for the unparalleled smoothness that defines this opulent fabric, offering both comfort and a touch of sophistication to the chosen upholstery.
Option B is the right answer.