C is the correct answer.
A main clause should be able to make a complete sentence on its own, which C cannot.
The result part of the sentence is then written in the "would + infinitive verb" form; this is called the present conditional tense. For example: I would answer if he called. If the weather improved, our crops would flourish.
Bright colors are typically used to draw attention to points on an advertisement.
Answer:
Hari asked if you could give them your pen please