Which of the following statement is correct?

Question

$\begin{array}{1 1}(a)\;\text{Electron releasing substituent decreases the basicity of aniline}\\(b)\;\text{Electron-with drawing substituent increases the basicity of aniline}\\(c)\;\text{Nitration of aniline is carried out by first converting aniline to acetanilide}\\(d)\;\text{Above all}\end{array}$