The poll was designed by a famous scholar from Poland.

a.

active

b.

passive

b. passive

Explanation:

The passive voice is formed with the verb to be and the past participle form of the verb. It is used when we focus on the result of the action and not on the person who performs it. As a result, who performs the action is not important or the subject is too obvious. In this case, the action was designed is performed by the agent a famous scholar from Poland.

The answer is passive