Question

Fill in the blank with an appropriate conjunction:

What would happen _______ I pressed that red button?

• A. when
• B. while
• C. as
• D. if

Answer 1

The correct option is D if

Here, the sentence is giving a condition, which when satisfied, will or might result in another event. To express such conditions, we use the word 'if'. Therefore, the correct option is: if.