This statement is True.
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The quote from the Gettysburg Address details how Lincoln used phrases in his speech to remind his listeners of the American ideals of liberty, equality, and the responsibility of government. Lincoln asserts to the people that it is their duty as survivors of fallen soldiers to uphold the ideals that they gave their lives for. Lincoln also cites religion, "...under God..." to support the idea of freedom and liberty for all people. He also defends the idea of the people and government having the responsibility to ensure that the government is representative of the wants and needs of the citizens, "...government of the people, by the people..."
Answer: a) selecting an impartial leader.
Explanation:
Groupthink is the technique which is used by a group of people to make a decision without considering opinion, thoughts,suggestion etc of members of group.This leads to elimination of creativity and degraded decisions.
To eliminate group-think, the possible way is to choose a impartial leader of that group. Impartial leader will tend to welcome and hear opinion and suggestion from members and also will not expect that everyone should to think about particular result.
Other options are incorrect because people who raise objection are also required so that their objection can be considered for betterment of decision.Conformity cannot help in removing group think.Outside experts are already not a part of group.
Thus, the correct option is option(a).