The symmetry condition in sign language requires what when both hands are in motion?

• A. They must have the same handshape
• B. They must have different handshapes
• C. They must be performed simultaneously
• D. They must be one-handed

Answer: (A)

When two hands move together in a sign, the way the hands are shaped is the key, not just how they move. The symmetry condition means both hands typically use the same handshape. This mirrored shaping makes the sign read as a single unit and keeps the visual pattern balanced and easy to recognize. If the hands used different shapes, the sign would break symmetry and be harder to interpret as a unified gesture.

So, the best answer is that the two hands must have the same handshape. Movement can be coordinated in various ways, and certain signs are built around other patterns, but matching handshape is the defining feature for symmetric, two-handed signs.