下列哪种可能从当前FirstActivity打开SecondActivity。
A.
startActivity(new Inent(this,SecondActivity.class);
B.
startActivity(new Inent(SecondActivity.this,FirstActivity.class);
C.
startActivity(FirstActivity.this,SecondActivity.class);
D.
startActivity(new Inent(FirstActivity.this,SecondActivity.class);