JEE Main 2023 Chemistry question on Atomic Structure

Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is __________

A. $T_4 > T_3 > T_2 > T_1$
B. The black body consists of particles performing simple harmonic motion.
C. The peak of the spectrum shifts to shorter wavelength as temperature increases.
D. $\dfrac{T_1}{v_1} = \dfrac{T_2}{v_2} = \dfrac{T_3}{v_3} \neq$ constant
E. The given spectrum could be explained using quantisation of energy.