Who urged her husband to "remember the ladies"? why did she say this ?

Wich of the following lines of poetry contains a simile

(22p ) who founded the plymouth colony in massachusetts a. puritans from england b. fur traders frime france c. catholic missionaries from spain d grain farmers from the netherlands

This is for my social studies guide and i can answer 21/22 of it perfectly fine. but can someone tell me what the caste system was, and what divisions/classes that it was apart of it?