We can say that ,
The above given sentence is given in Passive Voice :-
Use structure “subject + auxiliary + past participle + by + object”
Schools for girls are funded by them.

Correct Option: B

We can say that ,
The above given sentence is given in Passive Voice :-
Use structure “subject + auxiliary + past participle + by + object”
Schools for girls are funded by them.
Hence , option B will be correct answer .

Use structure “subject + auxiliary + past participle + by + object”
We can say that ,The above sentence is given in Passive Voice :-
The earth was believed to be flat for a long time.

Correct Option: D

Use structure “subject + auxiliary + past participle + by + object”
We can say that ,The above sentence is given in Passive Voice :-
The earth was believed to be flat for a long time.
Therefore , required answer will be option D .

We can say that ,
Use structure “subject + auxiliary + past participle + by + object”
The above given sentence is given in Passive Voice :-
Italian is being spoken by my brilliant niece.

Correct Option: D

We can say that ,
Use structure “subject + auxiliary + past participle + by + object”
The above given sentence is given in Passive Voice :-
Italian is being spoken by my brilliant niece.

Hence , option D will be correct answer .

We can say that ,
The above given sentence is given in Passive Voice :-
Use structure “ auxiliary + subject + been + past participle”
Has your question been answered?

Correct Option: D

We can say that ,
The above given sentence is given in Passive Voice :-
Use structure “ auxiliary + subject + been + past participle”
Has your question been answered?
Therefore , option D will be correct answer .

Use structure “Let + object + be + past participle”
As per the given above sentence is given in Passive Voice.
Let the door be opened.

Correct Option: A

Use structure “Let + object + be + past participle”
As per the given above sentence is given in Passive Voice.
Let the door be opened.
Therefore ,required answer will be option A .