Answer:
A) The party will be large and extravagant and will be held outdoors.
Step-by-step explanation:
Bilbo's party would be to celebrate his 111 years, an important and crucial age for the hobbits. The party, according to The Lord of the Ring's first chapter, it was extravagant because it would be his last party on the Shire (Bilbo would depart at first light), and gather all the important families of the Shire.