The correct answer is: C. 8 electron
Each subshell is designated by a letter, s, p, d, or f, which corresponds to the value of l, the angular momentum quantum number. The s subshell has l = 0, the p subshell has l = 1, the d subshell has l = 2, and the f subshell has l = 3.
Each subshell can hold up to 2n^2 electrons, where n is the principal quantum number. The s subshell can hold up to 2 electrons, the p subshell can hold up to 6 electrons, the d subshell can hold up to 10 electrons, and the f subshell can hold up to 14 electrons.
In the case of a subshell with l = 2, the maximum number of electrons that can be accommodated is 8. This is because 2 * 2^2 = 8.
The other options are incorrect because they do not correspond to the maximum number of electrons that can be accommodated in a subshell with l = 2.