The message 1001 is to be transmitted using the CRC polynomial x³ + x + 1 to protect it from errors. The message that should be transmitted is - - (5) Question not attempted

When transmitting a message using CRC, the original message is appended with a number of zero bits equal to the degree of the generator polynomial. This padded message is then divided by the generator polynomial using binary division (XOR operations) to find the remainder (CRC checksum). The final transmitted codeword is the original message with the calculated CRC remainder appended. However, in some question contexts, "the message that should be transmitted" might refer to the padded message before the final remainder is attached, especially if the correct codeword is not an option.