Which of the following are true about System.GC under version 3.5 of the Framework?

a.You can request that the garbage collector processes a generation if it determines that it is appropriate at specific points in your code.

b. you can control the intrusiveness of the garbage collector(how often it performs collections ) while you program is running .

c. You can control the intrusiveness of the garbage collector (How often it performs collections)only during application initialization.

d. You should specify LowLatency when using concurrent server Garbage collection to improve memory utilization.