Which is the only kind of orbital in the first energy level?
A. A d orbital
B. An f orbital
C. An s orbital
D. A p orbital

C. An 1s orbital

Explanation:

At the first energy level, the only orbital available to electrons is the 1s orbital, but at the second level, as well as a 2s orbital, there are also orbitals called 2p orbitals.

it should be all of them because it asks if you included all of those in your answer

explanation: