Choose the One Alternative That Best Completes the Statement or Answers

Choose the one alternative that best completes the statement or answers the question.
Complete the identity.
- $\sec ^ { 4 } \theta + \sec ^ { 2 } \theta \tan ^ { 2 } \theta - 2 \tan ^ { 4 } \theta =$ ?

A) $4 \sec ^ { 2 } \theta$
B) $\sec ^ { 2 } \theta + 2$
C) $\tan ^ { 2 } \theta - 1$
D) $3 \sec ^ { 2 } \theta - 2$

Correct Answer:

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