Read the sentence. mexico's full name is the united mexican states and it is known as estados unidos mexicanosin spanish. which answer shows proper comma usage? mexico's full name is the united mexican states, and it is known as, estados unidos mexicanos in spanish. mexico's full name is, the united mexican states, and it is known as estados unidos mexicanos, in spanish. mexico's full name is the united mexican states, and it is known as estados unidos mexicanos in spanish. mexico's full name is the united mexican states and it is known as, estados unidos mexicanos in spanish.