What was the result of the constitutional change regarding the Senate in the 1921 Belgian general election?

A. The number of senators elected by provincial councils was increased from 27 to 40 and 20 co-opted senators were introduced
B. The number of senators elected by provincial councils was kept the same and 20 new senators were appointed by the King
C. The number of senators elected by provincial councils was decreased from 27 to 20
D. The Senate was abolished and replaced by a new legislative body
Answer: 