Plz help me NO LINKS OR ELSE I WELL REPORT What is the best name of the solid that can be formed by this net?
A. rectangular pyramid
B. rectangular prism
C. triangular prism
D. tetrahedron

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.