Choose the correct explanation of the apparent paradox that both hypermethylation and hypomethylation of DNA are often found in the same cancer cell.
A. Although both hypermethylation and hypomethylation of DNA can occur in the same cancer cell, only hypermethylation results in cancerous changes.
B. Complex regulatory systems are involved. For example, hypomethylation of oncogenes and hypermethylation of tumor-suppressor genes are expected in cancer cells.
C. Although both hypermethylation and hypomethylation of DNA can occur in the same cancer cell, only hypomethylation results in cancerous changes.
D. Complex regulatory systems are involved. For example, hypermethylation of oncogenes and hypomethylation of tumor-suppressor genes are expected in cancer cells.
