Well most likely D. because you are suppose to use the masculine form with masculine nouns. It can also be C.
sentarse/Martin y Mónica/en la cafetería del hotel
lune is Monday
martes is Tuesday
miercoles is Wednesday
jueves is Thursday
vienes is Friday
sabado is Saturday
Domingo is Sunday
They want you to write in spanish what you will be doing for each day of the week.
1) es , 2) está hopefully it’s right
The answer is "le encanta" I think or what are you supposed to do?