What is the significance of the refractory period in nerve signalling?Which of the following is not an immunoevasion strategy deployed by cancer cells?
A. Repressing the expression of TATA and TSTA
B. Generation of an immunodeficient microenvironment
C. Secretion of TGF-? and Fas ligand
D. Repressing the expression of MHC-II receptors
E. Transdifferentiation of T cells into T-regulatory cells