Consider two Electronic Control Units $($ECU$)$ A and B to be connected to CAN bus ECU A sends a message M periodically through CAN bus A program embedded in ECU B listens to the CAN bus, monitors the message ID of M and figures out its periodicity. This is easily possible by taking note of the time interval between two successive transmissions of the same ID$.$ Now, the program in B computes a message M$\text{'}$ with the same ID as M$.$ M$\text{'}$ has at least one bit position in its message payload in which it is dominant $(0),$ whereas it is recessive $(1)$ in M while all preceding bits of M$\text{'}$ should be the same as M$.$ Since the IDs are same, both will win the arbitration and transmit at the same time, ECU B starts sending M$\text{'},$ with the same periodicity and at the same time when ECU A sends M in CAN bus What will be the transmission error count $($TEC$)$ of ECU A and B after $16$ transmissions of M and M respectively?

a TEC of both ECU will be $128$

b$.$ TEC of ECU will be $128$ and ECU B will be $112$

CT TEC of both ECU will be $112$

d$.$ TEC of ECU A will be $112$ and ECU B will be $126$