Suppose there are three Runnable tasks, task$1,$ task$2,$ task$3.$ How do you run them in a thread pool with $2$ fixed threads?

Question $5$Select one:

A$.$

ExecutorService executor $=$ Executors.newFixedThreadPool$(2)$; executor.execute$($task$1)$; executor.execute$($task$2)$; executor.execute$($task$3)$;

B$.$

ExecutorService executor $=$ Executors.newFixedThreadPool$(1)$; executor.execute$($task$1)$; executor.execute$($task$2)$; executor.execute$($task$3)$;

C$.$

new Thread$($task$1).$start$()$; new Thread$($task$2).$start$()$; new Thread$($task$3).$start$()$;

D$.$

ExecutorService executor $=$ Executors.newFixedThreadPool$(3)$; executor.execute$($task$1)$; executor.execute$($task$2)$; executor.execute$($task$3)$;