Which of the following options is the most suitable conversion of the following sentence into Passive Voice?
Do greenhouse gases cause global warming?
Show answer & explanation
Correct answer: A
Explanation
Conversion of an interrogative sentence from Active to Passive voice:
The sentence "Do... cause...?" is in the Simple Present Tense.
For the Simple Present, the passive structure for an interrogative sentence is: “Is/Am/Are + Subject (the original object) + Past Participle (V3) + by + Agent (the original subject)?”
Since "global warming" is an uncountable/singular noun, we use "is".
The past participle of "cause" is "caused".
Option ‘A’ follows all these changes.