A chemical reaction showing single displacement reaction is:

• A. \[NaCl+AgN{{O}_{3}}\to AgCl+NaN{{O}_{3}}\]
• B. \[{{H}_{2}}S{{O}_{4}}+2NaOH\to N{{a}_{2}}S{{O}_{4}}+2{{H}_{2}}O\]
• C. \[AgN{{O}_{3}}+Cu\to Cu{{(N{{O}_{3}})}_{2}}+2Ag\]
• D. All the above