198.Taiwan's highway route number signs use different frame shapes to distinguish road classifications.Which of the following pairings is correct?
(A) National freeways use a plum blossom shape, provincialhighways use a square shape, and city/county roads use a shield shape.
(B) National freeways use aplum blossom shape, provincial highways use a shield shape, and city/county roads use a square shape.
(C) National freeways use a shield shape, provincial highways use a plum blossom shape, andcity/county roads use a triangle shape.
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