When every party has something that might be of worth to other party, it results into ?

Exchange process is the correct answer

My answer is 2 exchange process

thanks for the invitation

the correct answer is 2

regards

Thanks for invitation ..................... my answer is 2

It results in to  exchange process.

Thank you for the invitation

I Choose (2).

Answer is 2, exchange process...

option (2) is the correct answer

Thanks for the invite.

Obviously it is exchange process .