שאלה | Your clustering analysis of gene expression data revealed a cluster enriched for genes involved in DNA repair, which is highly active in cancer samples. Question: What is the most plausible interpretation of this finding?

Your clustering analysis of gene expression data revealed a cluster enriched for genes involved in DNA repair, which is highly active in cancer samples. Question: What is the most plausible interpretation of this finding?

		The DNA repair pathway is activated in response to genomic instability in cancer cells.
		The cancer samples were contaminated with normal tissue.
		The clustering failed to separate cancer and normal samples.
		DNA repair genes are housekeeping genes unrelated to cancer.