Why did Odysseus give King Tyndareus the idea to make all of Helen's suitors swear an oath to defend the bridegroom?. . A.He thought he would marry Helen and wanted protection.. B.He thought most of the suitors would not agree—giving him a better chance of winning Helen..C. Athena told him to—she did not say why..D. He gave the advice in exchange for permission to marry Penelope.