The answer is D. The crust.
We’re standing on the crust. This is the outermost layer.
A = πr²
r = 3π
A = π(3π)² = 9π².π = 9π³ ≈ 279.05649
The <span>Romans and Arabs were the two groups that historically invaded portions of northeast Africa. Also, it is important to note that political independence swept through Africa during the 1950's.</span>