Which of the following factors increases the rate of a unimolecular nucleophilic substitution $(S_N1)$ reaction?

The correct pair$(s)$ of the ambident nucleophiles is (are):
$(A)$ $AgCN / KCN$
$(B)$ $RCOOAg / RCOOK$
$(C)$ $AgNO_{2} / KNO_{2}$
$(D)$ $AgI / KI$

Which of the following statements is correct?

Given below are two statements:
Statement $I$: $(CH_3)_3C-CH_2-Cl$ will undergo $S_N1$ reaction even though it is a primary halide.
Statement $II$: It will not undergo $S_N2$ reaction very easily even though it is a primary halide.
In the light of the above statements,choose the most appropriate answer from the options given below:

$Me_2C = CH - CH_2 - CH_2 - Cl$ $\xrightarrow[CaCO_3]{H_2O} (X);$ What is the major product $(X)$ of the reaction?

In the above reaction,the maximum Saytzeff product will be obtained when $X$ is: