Question: 1 . PCA obtains a new feature vector by transforming the new features. A . Compression in PCA is performed by linear transformations. B .

1. PCA obtains a new feature vector by transforming the new features.
A. Compression in PCA is performed by linear transformations.
B. Recovery in PCA is performed by non-linear transformations.
C. PCA only keeps the data projections without calculating covariances.
D. PCA only keeps the data projections with small eigenvalues.

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