Solution:В. Sign languages use a visuo-spatial medium, spoken languages use an oral-aural medium. → Correct, as sign languages rely on visual gestures and spatial organization, whereas spoken languages use sounds.
C. Sign languages have handshapes and palm orientation as phonemes, verbal languages have sounds as phonemes. → Correct, as phonemes in sign languages are represented through hand configurations, movement, and location.
(A) is incorrect because while sign languages use gestures, they are structured linguistic systems, not merely gestures.
(D) is incorrect because sign languages are not semantically limited; they have extensive expressive capabilities.
(E) is incorrect because sign language morphology and syntax are independent of spoken languages in their regions.