Which of the Following Statements Is Not True About the Reactions

Which of the following statements is not true about the reactions of carboxylic acid derivatives?

A) Carboxylic acid derivatives form a tetrahedral intermediate.
B) The weaker base will be the leaving group.
C) Less reactive derivatives can be converted directly into more reactive derivatives.
D) For a reaction to occur, the added group must be a stronger base than the group attached to the acyl group.
E) The weakest bond in the reaction is the pi bond, so it breaks first.