I think D I’m not really sure if that is right.
Explanation:
it is d Nixon proclaimed his innocence and said the issue involved National security.
Either a or b, I'm unsure.
It kept knowledge from previous ages safe, and passed their creative and inventiveness on to future ages.
All of the crusades were under the title of "holy war". For a holy war to happen, it had to be sanctioned by the Pope and waged against enemies of Christianity. Therefore this trip to Jerusalem was a pilgrimage because participants would kill non-Christians.
