Use Basic Identities to Simplify the Expression $\sin ^ { 2 } \theta + \tan ^ { 2 } \theta + \cos ^ { 2 } \theta$

Multiple Choice

Use basic identities to simplify the expression.
- $\sin ^ { 2 } \theta + \tan ^ { 2 } \theta + \cos ^ { 2 } \theta$

A) $\cos ^ { 3 } \theta$
B) $\sin \theta$
C) $\tan ^ { 2 } \theta$
D) $\sec ^ { 2 } \theta$