$1^{\text{st}}$ statement is Membership problem of regular language $=$ decidable
$2^{\text{nd}}$ statement is Emptyness problem of $CFL =$ decidable
$3^{\text{rd}}$ statement is accept everthing problem of $CFL =$ undecidable
$4^{\text{th}}$ statement is Membership problem of $RE$ language $=$ undecidable
D is answer.