Final answer:
The volume of a rectangular prism can be found by multiplying its length, width, and height. In this case, the volume is 79.38 cubic cm.
Step-by-step explanation:
The volume of a rectangular prism can be found by multiplying the length, width, and height. In this case, the length is 6.3 cm, the width is 6.3 cm, and the height is 2.1 cm. So, the volume is:
V = 6.3 cm x 6.3 cm x 2.1 cm = 79.38 cubic cm
Therefore, the accurate volume of the rectangular prism is 79.38 cubic cm, aligning with option A. This computation showcases the straightforward process of calculating volume by multiplying the prism's dimensions, resulting in the precise measurement of 79.38 cubic cm for the given prism's capacity.