Is this right? Please help

¿debo hacer una reservación antes de irme? a. es buena idea que hagas una reservación. b. es buena idea que haces una reservación. c. es buena idea hacer una reservación.

"in english, write six to eight sentences comparing cultural aspects of greetings in spanish-speaking countries with greetings in your own culture. use what you learned in the lessons to tell about three differences and three similarities. discuss non-verbal greetings and how respect is shown. you may also include verbal greetings, but do not simply translate phrases from one language to another."

Frank is from atlanta and maria tuberto barbero is from ciudad de méxico. they became pen pals and communicate by phone because they love to talk in addition to communication through emails. based on what you learned , how would frankk dial maria’s phone numbers when he talks to her