Sometimes mirrors made of polished (a metal b flags c arms d semaphore) which flashed in the sun were used over long distances.

you need need more details so we can understand what your asking us.

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99

the answer that is correct is the last option.

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