The most important goal of business communication is_________.

Option A: favorable relationship between sender and receiver
    While a good relationship is helpful, it's not the *main* goal.
    Having a friendly relationship doesn't guarantee the message was understood or acted upon.

Option B: organizational goodwill
    Goodwill is positive for the company, but it's a result of good communication, not necessarily the primary *goal* of each individual communication.
    Goodwill is more of a long-term effect.

Option C: receiver response
    Getting a response is good, but it doesn't guarantee the receiver *understood* the message.
    You want to know the receiver understood the message.

Option D: receiver understanding
    This is the best answer. If the receiver *understands* the message, then the communication has been successful.
    Without understanding, nothing else matters.

Therefore, the correct answer is Option D: receiver understanding. The primary objective of business communication is to ensure that the receiver correctly interprets and comprehends the message being conveyed.