Which of the following represent the cosolvating effect?

Options

A. The acidic strength HF increases in the presence of `BF_(3)`
B. The acidity of `NH_(4)^(+)` is enhanced in the presence of `Cu^(2+)`
C. The acidity of `H_(3)BO_(3)` is increased in the presence of glycerol
D. All of the given are examples of cosolvating effect

Answer

D