Task: Class Definition Understanding (ontology: Sciences/Computer_Science)

Which of the following definitions best describes 'pcaMethods'?

A. Quality control of Affymetrix GeneChip expression data and reproducibility analysis of human whole genome chips with the MAQC reference datasets.
B. This document describes the process of forging a BSgenome data package. It is intended for Bioconductor
users who want to make a new BSgenome data package
C. An integrated web interface for doing microarray analysis using several of the Bioconductor packages. It is intended to be deployed as a centralized bioinformatics resource for use by many users.
D. A cluster based method for missing value estimationn is included for comparison. BPCA, PPCA and NipalsPCA may be used to perform PCA on incomplete data as well as for accurate missing value estimation. A set of methods for printing and plotting the results is also provided.

Answer: A cluster based method for missing value estimationn is included for comparison. BPCA, PPCA and NipalsPCA may be used to perform PCA on incomplete data as well as for accurate missing value estimation. A set of methods for printing and plotting the results is also provided.