I think it's C
because if you say B it sound wrong
Los griegos fueron grandes navegantes y costruyeron unos barcos especiales para la lucha, que denominaban birremes o trirremes segun las filas de remeros que tenian.
You probably need to conjugate 'esquiar' to ustedes form but that depends on the form you guys are in like: Present or Past Pogressive, Preterite...etc.
Well, for one those come to America from other countries need to know basic manners to get jobs and to make living here.
