Topic: Group verb,

Best Answer Explained in Below-:

In the context of the sentence provided, "Due to some internal conflict the director --- the proposal submitted by the marketing manager," the phrase requires a verb that conveys the action of rejecting or dismissing a proposal. The best option among the provided choices is "turned down."

The phrase "turned down" is a commonly used idiom that means to reject or decline an offer or proposal. In professional settings, it is frequently used when someone does not accept an idea, request, or suggestion. For example, if a director disagrees with a marketing strategy proposed by a manager, they would "turn down" the proposal.

On the other hand, the other options do not fit the context. "Turned away" implies rejecting someone physically, such as not allowing entry, which does not apply here. "Turned off" typically suggests a loss of interest or attraction, while "turned out" implies revealing a result or outcome, which doesn't align with the act of rejecting an idea.

Therefore, "turned down" is the appropriate choice, as it accurately captures the action of the director in relation to the proposal.