Which Spanish town is noted for high quality steel swords?

Which of the following statements is /are true?

A. Entering wrong amount in the subsidiary book affects the agreement of the Trial Balance
B. Undercasting or overcastting of a subsidiary book is an example or error of commission
C. Errors of principle do not affect the agreement of Trial Balance
D. Both B. and C. above

Entering wrong amount in the subsidiary book does not affect the agreement of the Trial
Balance as the same amount is posted in both the accounts affected. Undercasting or
overcastting of a subsidiary book is an error of commission. Errors of principle do not affect the
agreement of the Trial Balance. Hence both B. and (c ) options are true.